So I was going to put together tools of the trade list untill I came across this article by that Hanselman fellow:
http://www.hanselman.com/blog/ScottHanselmans2009UltimateDeveloperAndPowerUsersToolListForWindows.aspx
Its massive… has all the tools I was going to mention and a million more. Most are totally free – and most make a serious difference to your .NET day.
Dom