I'd pick a type of project then pick a language/framework to learn. I'm not a big believer in learning something something just to learn it. You only get so far. I've got my own library of Haskell, Scala, and Lisp books but until I have something interesting to build, it's hard to maintain momentum. My two current projects are a Go web app hosted on Digital Ocean: http://thespanishsite.com

And I'm learning Swift to incorporate into my iOS apps. I've accumulated over 300 urls for anyone who wants to learn Swift: http://www.h4labs.com/dev/ios/swift.html