Personally I use the following:
SQL Server Customer Avisory Team (SQLCAT)
The Professional Association For SQL Server (PASS) (24 Hours of Pass, SQL Rally, SQL Saturdays and Local SQL User Groups)http://www.sqlpass.org/
SQL Server Central
sqlservercentral.com
Business Inteligence Developer Network
BIDN.com
MVP Blogs
Paul S Randal
Kimberly L. Tripp
Glen Berry
Brent Ozar
Buck Woody
Allen White
Kendra Little
Jeremiah Peschka
Thomas LaRock
Johathan Kehayias
Matt Hester
(and others)
Then I search to see if the information is consistant from multiple sources.