Even better screenshots!
I posted in January a tip with the quick shortcuts for taking screenshots: "Command - Shift - 3" for the whole screen and "Command - Shift - 4" for a part. Well here is a great tip submitted by Joseph that complements that. When you press "Command - Shift - 4", instead of selecting an area to capture, you can simply add a "Spacebar" and a little camera will pop up enabling you to take a screenshot of only one window without having to select precisely what to capture! Thanks Joseph for that great tip!