I'm bad about remembering to stop and do things on the way home (my autopilot doesn't turn off easily), so I figured I would look at Remember the Milk. Signing up was easy, and I started poking around the site.
As soon as I got to the map tab, I laughed. This? Quite familiar, for reasons entirely unrelated to work. That link? A screenshot of the log and map from World of Warcraft that tracks what quests your character is working on, how much you've completed, and where you need to go to complete them. Knowing how well that set-up works for optimizing time use in-game (doing geographically clustered tasks at the same time), this could be quite useful, if I needed to run a bunch of errands and wanted to map them out with a checklist. On the other hand, I'm not sure my life is complicated enough to need mapping out errands.
