Learn cool stuff about Silverlight every day with the Silverlight tip of the day. Just subscribe to the RSS feed in your favorite reader. Here's one which shows how to implement right-click in a Silverlight application without the annoying Configuration...
Here are some cool tips and tricks to really make your production websites fly!!! http://daptivate.com/archive/2008/02/12/top-10-best-practices-for-production-asp-net-applications.aspx
Maximize asp.net performance in your website with these cool tips!!! http://www.codeproject.com/KB/aspnet/10ASPNetPerformance.aspx?obid=23306&obtid=2&bmkResult=success