It's pretty easy to use the Android Market and find a free app for it, but how do you get the application you want? The biggest problem with Android Market is that you can't just download the free app for free because if you did, you would only be allowed to download it once. This means that when the sale goes through, you have to wait a few weeks before you can even try and download the application again. This isn't a problem if you're just downloading the free application but the question is, are there other options?
You can download a paid version of Android application and from there, you'll find that many of the apps in the Google Store have paid versions for you to download. The paid versions are almost as good as the free version and I'm sure you'll find them worth the price you pay for them. If you're not interested in paying a full price for an app, you can get apps that are free or even cheap on sale. There's tons of online resources to help you find a free or low-cost app but just in case you can't find what you're looking for, here are some resources to get you started.
You can check out the Android DPC website. They offer a variety of different applications and the best part is that they offer an easy download option. Another option you have is to search for it through Google and do a search on the keyword you're looking for. Most of the time, you'll come up with many options for you to choose from so I'd suggest you just take your time and pick out a few and see what works for you. You can also check out the Android TV community if you want to chat with other users on what they've downloaded and to get suggestions about what you may want to download.