Yep. This site is very good. You can also look to ask.sqlservercentral.com for simple question/answer style of issues. You can also look to Simple-Talk.com to for in-depth articles.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning