Coffeescript is your friend
Don't rely too much on books, try something real
Avoid DOM and UI
Focus on getting it done, learning is a bonus
It's better if you choose to do something you want to use, or at least something you find really interesting. And focus on getting it done. All ninja skills you want to learn come as a bonus. Remember those old Jackie Chan movies in which kung-fu master make him do his household chores? Just focus on washing clothes, you'll learn iron-fist style without knowing it, as a bonus.