Okay, this is a subjective thing. I’m a very chaotic occasional wordpress developer and I google everything. Tons of good sites and some junk has turned up in those searches, and an occasional miss.
Anyway, here are the sites that helped me most with WordPress, fresh from my bookmarks, so all the links are pointing to some useful tuturial as a bonus
- DigWP
- Six Revisions
- Makeuseof
- Pippins Plugins
- CatsWhoCode.com
- Wptuts+
- How to use Ajax in WordPress
- Deluxe Blog Tips