Just found a neat little trick in Photoshop CS 5 by accident and wanted to share.

Anybody who has always wanted to have a shortcut for the color picker: Alt+Shift+right-click brings it up! Not sure if this works in CS4, too. It's different than the standard picker also, the color selection is swift and intuitive. Hover over color, release buttons!
So whoever didn't know, this comes in handy I think.
Well, if not, that's also ok. The world still goes round.

PS: Also, brushtool selected, clicking alt+right-click and dragging resizes brush.

I wonder how many comments I'll read about how I was the last person to know these things lol.