Something I've never known. You can restart windows without waiting 30 seconds for your BIOS to finish loading

Windows Vista: Select Start, then hover over the arrow to the right of the padlock icon until the pop-up menu appears. Hold down the SHIFT key while clicking "Restart".

Windows XP: Select Start, then "Shut Down…". Change the drop-down box "Restart". Hold down the SHIFT key while clicking OK

You could probably do the same in Windows 3.11 by dropping to a DOS shell and typing "win".

[Via: CodeJacked]