With the power of Greasemonkey
and its scripts, you can now use shortcuts
to quickly jump from your scrapbook to
your home page, for example. Download
the script from http://userscripts.org/
scripts/source/12784.user.js and then use
the shortcuts given below.
Home: [Ctrl] + [Shift] + [H]
Scrapbook: [Ctrl] + [Shift] + [S]
Friends list: [Ctrl] + [Shift] + [F]
Communities: [Ctrl] + [Shift] + [C]