Now that I'm a DVC member, I'm starting to do some things at WDW that I would normally do on a vacation. For me, that always means bringing along a book or two and some needlepoint. I don't have to kill myself on each trip to get to each and every park, so I might spend a morning sleeping in, eating lunch in the room, and reading or stitching on the balcony in the afternoon. I find a half or full day of relaxation comes in handy after a few days tramping around the parks.
Also, and I know this seems pretty shallow, but since I know I'm going to be coming back again and again, I occasionally stay in to watch a breaking news story on TV. We were at WDW when Reagan was buried, and since we were all kind of tired we just watched TV and had meals in the room. I was also at WDW when the Pope and Terri Schiavo were big news, so I spent some time keeping up on those major stories. I'm pretty addicted to my news in real life, and while I wouldn't pass up Test Track to watch a normal CNN crawl, it's nice to know I can occasionally spend some time in the room watching TV!!!!