The best I'm able to do is to try to consolidate all my trips into one so I don't have to go out more than once a day. Also using the vehicle appropriate for what I'm doing (4Runner around town with baby, little commuter sedan for commuting to work). Unfortunately I commute 30 miles one way for work (sometimes more depending on where I get sent) so I'm stuck in that respect.
Gas prices are hurting though. I don't even want to look at the total price on the pump any more. At $4.09 or more per gallon, anything hurts.