Here in the HTMLab, I’m fairly skilled at what I do (namely, HTML and CSS), but many of my articles would not be complete without some heavy-duty online research and self-teaching. Listed below are four sites whose tutorials make it easy for even this self-taught, non-technical webdesigner to understand:

WebDesignerWall
Awesome articles abound here about the subtler points of design (which I definitely need help with!)

WebDesignLedger
This site covers everything from helpful webdesign tools to overarching Web trends…really informative!

Webdesign Tuts
Need a tutorial on how to make a webdesign visually work? Webdesign Tuts (part of the TutsPlus network) likely has the help you need, for both front-end and back-end design.

Webdesigner Depot
This site literally runs the gamut of everything a webdesigner is concerned about (even marketing and branding)! You could spend hours browsing and learning.