I've always had a small air compressor at home to fill up things like basketballs and vehicle tires. I don't remember what make/model mine is (will post when I'm at home to check) or how much we spent on it, but it's SO much better than having to drive to a service station just to top off my tires. We used to also use it on our bicycle tires, until we got nice bikes and opted for a manual air pump that we could haul around in the truck/vehicle when we go mountain biking.
Here are
options on Amazon.com
Mine would most closely resembles this one (but with A/C power, not cigarette lighter) --
http://www.amazon.com/gp/product/B00...423819-5152820
Note: mine, due to its small size, takes a fair amount of time (at a count of 1 to 15 or 20) to inflate vehicle tires from 35psi to 40psi. My dad has a "real" (large tank type with wheels) air compressor he uses and it's so quick I dislike using it -- very easy to overfill with lots of stops to check pressure, bleed off excess. These higher cost, larger pressure/capacity models are best if you have other tools and purposes you want to use the compressor for. Dad's has things like a nail gun, lug nut remover (I think; probably using wrong terms) and such that attach to his, in addition to the standard vehicle tire pressure attachment.