One of the most useful things I've been making is an online and constantly updated repository of the notes, code blocks, and templates that I continually reference when I'm building or fixing something.
Then I thought that I might as well share the wealth with other web designers and developers, and so here we are. I wish I'd stumbled upon a treasure trove like this when I first started out--it certainly would have saved me a lot of time and headaches. Why does official documentation always have to be so opaque and dry (especially for newbies)?!
Enjoy these materials. And feel free to add a bookmark and come back as often as needed. I'm always adding new stuff.