When using a full-screen app in Lion, you can move the mouse to the bottom of the screen, then move it down again to show the Dock.
If you hide your Dock but still use it a lot, this is a handy Terminal command for speeding up its hide and show animations.
OS X’s Finder makes it easy to collect your favorite stuff for easy access. Give these shortcuts a try:
- ⌘-T will add the currently selected app or file to the sidebar on the left
- ⌘-⇧-T will add apps to the left side of your Dock, and files to the right side
Note: if you don’t see a sidebar or a toolbar at the top of your Finder window, hit ⌘-⌥-T (View > Hide Toolbar) to show them.
You can also drag just about anything to the toolbar at the top of your Finder window, though I haven’t been able to find a keyboard shortcut for that.
If you try to drag a running app that is marked to “Keep in Dock” out of Snow Leopard’s Dock, the icon will simply snap back to its place. However, after you quit the app, its icon will disappear from the Dock.
Compatibility: This was discovered on Mac OS X Snow Leopard 10.6.7. Commenter Tavi says it works in 10.5 as well.