A couple of issues ago, I included our list of top OS X keyboard shortcuts. If you’d like to add to that list, then take advantage of the fact that you can create your own.
Go to System Preferences > Keyboard > Keyboard Shortcuts and you’ll see a list of shortcuts that you can customize. In Lion, the full list includes Launchpad and Mission Control options in addition to Dock, Screen Shot, Input, Services, Universal Access, Spotlight and Application Shortcuts.
You don’t have to be a slave to the shortcuts that are pre-programmed; create your own!