I agree. Reading books and materials can only take you so far. In my experience, after reading an iOS dev book for countless time, you think you get it, but after a few weeks.. you tend to forget all about them. Eventually, i decided on a project to work on, and when i get stuck, refer to the book and continue working on it until it is done. I think the concept sticks better that way, plus you get a sense of satisfaction of a finished product..