Just browse the Google store: https://play.google.com/store/apps. I like the "Top Free" category because I am cheap, but you can check others out too if you don't mind paying. Most major brands will be at the top, such as Facebook, Kindle (for e-reader), Skype, Pandora, etc. There are also a lot of games. And if you…

Here's a good starting place: http://lifehacker.com/5924212/lifeha…

droid-life.com has a really great tutorial section. From insultingly easy to some slightly more advanced stuff you'll probably find that really useful.