I find that even though my desktop environment is geared toward productivity (i.e. I can switch quickly between vi, the shell, firefox, etc), I actually get more work done from on campus when I VNC to home. That is, I waste less time doing things like reading random posts on this site, and actually do what I set out to do. Even now, I have a homework assignment due in about 10 hours that I can't bring myself to work on.

So I must agree that at least having some sort of separate workspace must help somehow. I think the real root problem, however, is to layout a schedule for yourself and follow it. Going to an office forces you to do that; writing a schedule down and being committed to following it could feasibly accomplish the same goal.

Note to self: make a schedule.