I would just build a few things however you want, not how you think you should. I wanted to learn some new languages but kept getting stuck not doing anything.

I would just build a few things however you want, not how you think you should. I wanted to learn some new languages but kept getting stuck not doing anything. Instead I'm now mucking around with a Unity game, using C# which I already know, and have suddenly found the motivation to start the udacity android course. Just do what you want to do, not what you think you should do, once you've got your enthusiasm for programming back you'll find an excuse to learn something new.