Much to the chagrin (and much against the ill wishes) of wireless carriers such as AT&T, Verizon, Sprint, and T-Mobile, people are buying Wi-Fi-only tablets. In fact, some studies have shown that in 2011 up to 90 percent of all tablets sold in the United States relied on Wi-Fi, rather than on 3G or 4G LTE.

Today's Wi-Fi-focused tablets include the Wi-Fi only version of the Apple iPad, the Amazon Kindle Fire, the Asus Transformer Pad Infinity, the Google Nexus 7, and the Samsung Galaxy Tab, to mention a few.

I hate to say it, AT&T, but this makes sense: Wi-Fi only tablets are cheaper (and I'm not talking exclusively about the Wi-Fi-only iPad, but also about tablets that never had a data option, such as the Kindle Fire and the Nexus 7), and people are discovering that they just don't need an extra data plan. Don't believe me? Check out these 10 tips for getting the most out of your Wi-Fi-only tablet.

1. Tether, tether, tether

If you already have a smartphone with a data plan, you don't need to waste money on an additional plan for your tablet. Instead, use your phone's plan to get an Internet connection for both devices.

There are two ways to tether, or turn you phone into an Internet hotspot, using today's smartphones.

One option is to use your phone's built-in tethering ability, which means you'll likely have to pay your carrier an extra fee for the service. The other is to download a third-party tethering app such as PdaNet (for nonrooted Android phones), Wireless Tether for Root Users (for rooted Android phones), or PdaNet for iPhone (for jailbroken phones).

The only problem with tethering is that carriers do their utmost to discourage it. If you use your phone's default tethering ability, you'll have to pay your carrier a fee of around $20 for the privilege. That's $20 on top of your already pricey data plan--and you don't get any extra data.

And if you use a third-party tethering app, your carrier can charge you if it finds out (unless you happen to be on Verizon). And only jailbroken iPhones can run third-party tethering apps.

But jailbreaking, rooting, or paying a monthly fee may be a small price to pay for the freedom to use your Wi-Fi only tablet (and other devices, such as your laptop) wherever you can use your phone.

2. Get a mobile hotspot

Instead of tethering your tablet to your phone's data plan, you may want to consider picking up a mobile hotspot from your local wireless carrier.

A dedicated mobile hotspot can yield better results than tethering your phone's data connection. For starters, it's often faster and more reliable than a tethered phone's connection. And whereas tethering can drain a phone's battery quickly, mobile hotspots commonly deliver many hours of battery life.

I use the Novatel Wireless MiFi 4510L for Verizon LTE, which offers long battery life, excellent data speeds, and a solid connection--unlike my Galaxy Nexus phone.

Though the MiFi 4510L lost out in PCWorld's hotspot tests to the Samsung 4G LTE Mobile Hotspot, the main advantage of the MiFi 4510L is its ability to keep its connection while moving. The Samsung 4G LTE is speedier when you're sitting still, but, in my hands-on experience, the MiFi 4510L maintained a solid connection on a 9-hour drive to Vegas (our PCWorld tests didn't evaluate this capability).

3. Preload magazines and books

Tablets are the perfect travel device - they're lightweight, they have large screens, and you don't need to take them out of your bag during a TSA search. Tablets are also great because they let you carry around tons of reading material without weighing down your bag.

So the next time you head out of town (or go to the gym or hop on the train for your morning commute), try preloading some magazines and books on your Wi-Fi-only tablet so you can read at your leisure--without an Internet connection.

Zinio (for Android and iPad) is an excellent reading app that lets you subscribe to hundreds of magazines (in full color). Sure, you have to pay for the subscription (which isn't much cheaper than a print subscription), but you can download entire magazines before you leave your Wi-Fi zone.

The Amazon Kindle app (Android and iPad) is a great reading app--not just because you can download and read ebooks from Amazon's online store, but because you have free access to tons of ebooks from your local library. Find out whether your library participates by searching OverDrive.

4. Use offline mapping apps

Mapping applications on smartphones and tablets have made getting lost practically obsolete (practically...), but such apps only apply to devices that have constant data connections, right? Wrong--thanks to offline mapping apps, you can stay on track wherever you are, data connection or not.

For a couple of years now, Google Maps has had an offline-viewing option that can even offer turn-by-turn directions without connecting to a network (providing that you've already looked up the route).

If you're heading to a new city and you aren't sure when you'll be able to grab a Wi-Fi connection, try a mapping app such as City Maps 2Go (Android and iPad), which costs $1 to $2. This app lets you download thousands of maps for offline viewing (the iPad version currently has a promo for unlimited downloads, while the Android version offers five free downloads).

5. Read it later

Suppose that you like to read Web pages--not magazines and books--on your tablet. Instead of letting your lack of Internet connection frustrate you, try using a service such as Pocket, formerly known as Read It Later.

Pocket lets you save Web pages from your computer, by email, or directly from select apps to a special Read It Later list. Once you've saved something to your list, you can open it from any of your devices, assuming that you've connected to the Internet long enough for your list to update.

Download the Pocket app for Android, iPad, or Kindle Fire, and read all of those webpages later on--without an Internet connection.

Next: Use free texting apps

6. Use free texting apps

Having a Wi-Fi-only tablet with no phone service or data plan doesn't mean that you can't text your friends with the best of them.

Admittedly, texting on a Wi-Fi-only device doesn't make a lot sense for most people--after all, texting is normally used for instant communication, so it doesn't make a lot of sense to have to find a Wi-Fi connection before you can check your text messages--but some people do text casually. Plus, this approach will save you some money.

One free texting app, TextPlus (Android, iPad, Kindle Fire) lets you text any U.S. or Canadian number for free. Similarly, Pinger's Textfree (Android, iPad, Kindle Fire) lets you text to tons of countries for free, and it has the added benefit of giving you a real phone number so you can pretend that you really have a phone (and so your friends can text back to a phone number, instead of to an email address).

7. Load up on tablet-optimised offline games

Mobile games are hot these days, but the hottest ones always seem to require a constant data connection. You can't play social games such as Zynga's FarmVille or Words With Friends unless you're connected to the Internet, which is fine unless you happen to have a Wi-Fi-only tablet and you're in a Wi-Fi-less area.

To deal with that situation, try some tablet-optimised games that don't require an Internet connection - many games in the action/adventure, hidden-object, and puzzle genres don't. Titles worth checking out include the gorgeous puzzle game Osmos HD (Android, iPad); Shadowgun THD (Android, iPad), a third-person outer-space shooter; Dead Space (Android, iPad), a first-person horror survival game; and Empress of the Deep (Android, iPad), a hidden-object game.

8. Share files between devices wirelessly

Sending files between your Wi-Fi-only tablet and your computer can be extremely easy if you use an app such as WiFi Files (iPad) or WiFi File Explorer Pro (Android/Kindle Fire).

These apps let you wirelessly transfer files between your tablet and your computer via a Wi-Fi connection. Note: Such transfers are faster and less complicated than (for example) emailing a file to yourself.

You can also check out syncing apps, such as SugarSync (Android and iPad) and Dropbox (Android and iPad), which automatically sync your selected files with all of your devices whenever you're connected to the Internet.

9. Find a Wi-Fi connection

Finding a Wi-Fi connection usually isn't very difficult, but many popular dedicated apps such as Wi-Fi Finder require an Internet connection in order to search for a Wi-Fi hotspot. Obviously, if you're working with a Wi-Fi-only tablet, that prerequisite won't fly.

Instead, check out apps such as Wi-Fi Analyzer (Android) and WiFi Scanner (Android) to see nearby networks and their signal strengths. (iPad users have a harder time of it because Apple pulls Wi-Fi scanning apps from the App Store; consequently, the only alternative is to jailbreak your phone.)

Want to know whether a "free" Wi-Fi network actually requires a browser log-in? Check out WiFi Browser Login (Android), which notifies you if the Wi-Fi network that you just connected to is about to shut you down when you open a browser window.

10. Use Wi-Fi to make phone calls

Assuming that you never make calls on the road, maybe you can get rid of your pesky cellphone plan altogether--and use your Wi-Fi-only tablet to make phone calls through a service such as WiCall (Android), which lets you call over your wireless connection.

These calls aren't free - they cost $0.009 per minute for US calls - but that's a pretty negligible charge. If you'd prefer to pay up front, you can sign up for a service such as GrooVe IP (Android, $5), which lets you use your Google Voice account to make free phone calls.

iPad users can check out the free MagicJack, which allows you to make free phone calls to any US or Canadian phone number.

Data plans - Who needs 'em?

Considering all of the things that a tablet can do without a data connection, it's no wonder that people are overwhelmingly choosing to purchase Wi-Fi-only models. 3G/4G tablets cost more, they require an extra data plan, and they will incur an extra charge on the new shared data plans.

In contrast, you can do just about everything you need to do (except, perhaps, answer emails on the fly or make phone calls on the road) with a Wi-Fi-only tablet. And if you ever do need an Internet connection, you can tether your tablet to your phone or sniff out a wireless hotspot.

Sorry, wireless carriers: it looks like Wi-Fi-only tablets are here to stay.