Practice after Swift 2.0 first course completion

I like to warm up on a playground with the material before learning new things. I tend to like to redo the quizzes and even rewatch or reread documentation on the concepts I learned the day before, especially if I think I only half-learned it. I find it super helpful as well to answer questions on the forum of tasks you have already completed. It really drills it into your head if you think about learning as preparing to teach.

If you force yourself to think that everything you learn, you'll have to teach, it forces you to really understand the material on a deeper level. I'd also suggest diversifying your learning resources. You don't invest in only one stock. Why invest in only one learning avenue. I love Treehouse but I also use AppCoda, Ray Wenderlich, and Hacking With Swift. While all the concepts are the same, the way they describe it may be slightly different. You don't know how many times I have gone to one site and not understood a word only to go to another and have that wonderful "Aha!" moment.

Lastly, BUILD. Build, build, build. You can make extremely simple apps just by knowing basics like Strings and UILabels. Do that. Then add a challenge for yourself to add a button to change the label. Then add a challenge to add transitions, then backgrounds, then videos, then multiple view controllers etc. Google is your friend. Don't know something? Google it. "How to [do something] to [something else] [language]" I've found is a good google search - e.g. "How to [add transitions] to [UIImageViews] [Swift]" Stack overflow is an unbelievable resource.