Aside from this year's vacation (~7000 miles) and store/health/volunteer/family functions, we can't think of any additional cutbacks we can make to our driving habits. We just said "screw it" for our vacation; the prices will probably be a lot higher next year, or even if we wait until later this year, so we are going.
Hell, we aren't doing any less driving than we've done for the last 20 years or so. What cutbacks have you made regarding driving?