Daily product hacking tips and tricks

By far the best way to customize FB is to use Greasemonkey scripts.

1) You have to use Firefox as your browser

2) Install Greasemonkey add-on

3) Install scripts from userscripts.org

See http://mashable.com/2008/12/25/facebook-greasemonkey-scripts/ for a good list of scripts.

By far the best is Facebook Fixer (http://userscripts.org/scripts/show/8861) it lest you customize many aspects of Facebook. It is really fantastic!