After you've tried out some of the books, read them through, make sure you try many things and ideas out on your own. The only way to really learn a language is to write programs in it. After you have a good understanding, answer some questions on SO. This can really help you learn stuff and have fun talking code with other people. An SO technique I use is to find a user with 20k + rep who has a lot of posts in the javascript tag, then look at some of their most upvoted javascript answers. Good luck! :D
