Use your home computer from work (VNC over SSH)
I've got a handy tip for folks who have a desk job: Keep your personal and professional life separate by securely controlling your home computer from work (VNC over SSH). As long as you're aware of the advantages and disadvantages of this technique, it's very convenient and useful.
Edit 2006-10-8: I flubbed the ssh installation instructions. There is no "openssh" package. There is "openssh-client" and "openssh-server", both of which are necessary. You can install them both by installing the package "ssh".
Edit 2008-2-17: Changed local VNC listening port to 5901 to avoid port conflicts.