VS2008 :: Transparent intellisense trick
Isn't it annoying when you need to enter a line of code above some other code, the intellisense opens, perhaps the parameter info tooltip too (all these you need, of course), but you also need to see the name of the variable you have in the line beneath but just can't because all these small windows are blocking it...
You end up with something like this :

Well, in VS2008, there's this cool feature allowing you to hold down the 'ctrl' key, and turning these small tooltips and windows into transparent!
I won't upload an image of how it looks, so just try it on your own...