Monitor space is a terrible thing to waste. Yet most of us sacrifice valuable screen estate to omnipresent toolbars, which appear in our Web browsers, our word processors, and other apps.
If you'd rather expand your software so it fills the screen, learn these handy keyboard shortcuts:
Chrome, Firefox, and Internet Explorer: F11 toggles full-screen mode.
Google Docs: Ctrl-Shift-F turns off the Google toolbars; Esc restores them. You can also used the aforementioned browser
iTunes: Ctrl-F enables full-screen mode when you're in Cover Flow view (and it looks cool that way); Esc restores the standard view.
Microsoft Excel and Word: Press Alt-V, then U to enable full-screen mode. Esc gets you out of it.
Windows Media Player: While in the Now Playing view, hit Alt-Enter for full-screen mode, Esc to return.
While we're on the subject, check out one of my favorite "screen savers": Move the Taskbar to the Side of the Screen.
And speaking of shortcuts, don't miss Six Windows 7 Keyboard Shortcuts You Need to Learn Right Now.