I'm definitely installing this one when I get a chance.
http://channel9.msdn.com/posts/briankel/PDC2008-ShowOff-Entry-Clipboard-History-for-Visual-Studio/
Basically it keeps a history of your clipboard items like Office but with one killer twist. "Paste as {Language}". It will take the C# you copied and Paste it as VB. I'm sure it's not 100% but still helps quite a bit.