Every time you use the scroll wheel on your mouse you scroll 4 lines at a time in Windows Vista.  This is adequate for most users but did you know that it is possible to tweak this setting to make your scroll wheel more or less sensitive? It is possible with a quick little reg hack.

1. Click on the Start Button and key in regedit and hit Enter.
2. Navigate through HKEY_CURRENT_USER\Control Panel\Desktop.
3. Scroll to the bottom and edit WheelScrollLines. Set this to a lower value for a more sensitive scroll wheel. larger for less sensitive.
4. Reboot.