How to learn ajax
It made me 
How I did it: I read the book Bulletproof Ajax, but it wasn't until I watched the podcast "The Art of Code" that it started to make sense. I reread the first couple of chapters of the book again while typing up my own cheat sheet and now it makes sense.
Don't confuse AJAX with the all the Javascript libraries that are out there (YUI, JQuery, Mootools ...etc). Some of them have AJAX built in but they don't == AJAX. They are just libraries.
Resources: Bulletproof Ajax by Jeremy Keith - http://amzn.com/0321472667
Art of Code Podccast - http://webcode.mevio.com/
