You can change the order of the items in the Sharing menu, add and delete items, and more! Put the things you use at the top. Who knew?
Smart Groups in Contacts offer a way to search for information in specified fields. Set up permanent "canned searches" for various criteria.
Put frequently-needed Mail folders into the favortites bar at the top of the Mail window. Quick and easy access. You'll use these a lot.
Do you miss hearing the volume get louder and softer as you tap "Volume Up" and "Volume Down" buttons? I did too. Here's how to get that back.
Hold the Option key while tapping volume up, volume down, or Mute on the keyboard to quickly access the Sound preferences.
Hold the Option key while tapping the bright/dim buttons on the keyboard and the Displays preference pane pops up. So cool.
Here's how you show how much charge your laptop's battery has-- the precise percentage. If your menu bar is getting crowded, turn it off.
Minimize a window with a simple double-click in the title bar. It's easier to click the title bar twice than to click the yellow button once, because the target is so much bigger.
Hold the Shift key down while clicking the red, yellow, or green button in a Mac window's title bar to see the effect in slow motion. Very beautiful and fun.