I think the Reiny Day Idea Box is a wonderful idea.

Once, when a few friends and I were at loose ends for an activity for a slow Saturday, we decided to go through the Yellow Pages till we came across something that sounded like fun. We ended up ice skating in Berkeley. Much fun was had ... and I think that was the first time I'd been across the Bay Bridge ... since the earthquake. I remember the drive more than I remember the ice skating. Still, it was fun and now I there's a resource out there that's a little more to the point than going randomly through the phone book.

Via Jisheroo.