The true panacea, exercise really is good for everything. A recent systematic review by Passos et al. (2012) looked at all the studies on sleep and exercise that were published between 1983 and 2011.
1. Park At the Lonely End of the Lot
Find the worst parking spot you can possibly get. Then park that car and start walking. It will add one more minute to your trip but it’ll sneak exercise in.