The Old Switcheroo
During the course of my workday, I find myself constantly having to switch between applications. Sure, I could use the Dock or Expose. But there’s a handy keyboard shortcut that I like that lets me quickly switch applications.
Hold down the command and tab keys to bring up the application switcher. Use the tab key to cycle forward through the open applications. Use the tilde key to cycle backward through the open applications.
But that’s not all, folks. If you want to quit an application, while still holding down the command key, press the letter Q.

