If you don't already follow Sara Ford's blog, you really should subscribe to her Visual Studio 2008 Tip of the Day. She'll enlighten you daily with nuggets of good info about Visual Studio 2008. For Visual Studio 2005, she ran a Visual Studio 2005 Tip of the Week that was an excellent resource.
It’s that time again… but notice this time it is “tip of the day.” That’s right. For Visual Studio 2008, I’m going to attempt to post a tip every day of the work week. Yeah, tip of the day doesn’t work on weekends. =)