I LOVE this tip for Vista from Jon Hicks, author of the Official Vista Magazine (thanks to James for passing it on). I posted an blog entry a while back on shortcut keys in XP but this is just fantastic if you're a big user of the shortcut tray on the taskbar like I am - as below

then you will LOVE this.

• Hold the Windows key and click on the number representing the app you want to launch.
• In the example using my tray above, Win Key + 2 will launch Internet Explorer
• Win Key + 3 will launch Outlook 2007
• And so on....

This is such a cool little time saver mainly as I am a big user of "show desktop" - Win Key + 1 in this case.

If you're running Vista, give it a go. For some additional eye candy, minimize all apps (Win Key + 1 for me) and then hold Ctrl and the scroll wheel on your mouse if you have one. Cool eh?

Link to Windows Vista™ Magazine