This weekend, there were two great articles in the Seattle Times about hypermiling:
Check them out if you want more information; each article lists several different hypermiling websites if you really want to get into the subject.
One small tip that I had not thought of before was parking nose-out instead of nose-in, because going in reverse when your engine is cold is less fuel-efficient than when it is warmed up. This got my hubby feeling pretty smug because he has been backing into the driveway forEVER (at least the whole time we have been married, going on 21 years).