Where is a good place to share cool tips?

I found a pretty good one and wondered if there was a place where we could all post stuff we find from other places?

This one minimizes all windows except present window.

Windows button AND Home button.

Same combination again to bring windows back.

PS. Anyone know a way to assign a button or MOUSE to the Zoom feature?
Windows 7 looks like its going to be a really good thing from I have seen so far.