I am really still figuring things out as a cook, so I use lots of different cookbooks and websites to get ideas.
My favorite websites right now that I use for recipes are:
Nava Atlas's blog and her "recipe's galore" site
Dreena Burton, the author of Vive le Vegan! and Everyday Vegan has a recipes site and a blog where she posts things she is working on. In addition, there is a site where she posts a lot of useful information on ingredients that she uses.
The Vegan Lunchbox always has good ideas and tips, and the recipes for some of the lunches can be found at Shmooed Food.
I broke my promise to myself of not buying anymore cookbooks when I saw The Silver Spoon on sale at Costco. I justified the purchase because it is basically a cooking encyclopedia (it is arranged by ingredients and the index is wonderful), it was half the usual price, and it was published by Phaidon. My dream library would probably be 80% Phaidon and MIT Press books.
I think that I really do need to stop buying cookbooks, but I am contemplating subscribing to Cook's Illustrated because I love watching America's Test Kitchen. Not only do they make awesome things, but they research the recipes and explain why certain ingredients work better than others and have lots of reviews of the kitchen tools and brands.