Alright so I've learned a decent amount in the past few days (I'm new to rooting), and I'm pretty sure I want to experiment with a rom. Now the only thing I don't understand is how to back up apps. I've already made a nandroid back up of my current phone state, and I know how to back up contacts, but I cannot figure out how to back up apps. I've heard of something called google cloud, but I have no idea what it is, nor can I find anything on it. Help would be appreciated.