Look at the pics I posted
here
I use the wood bits I created to either raise the car off of the ground by the tires, or to put the car on a set of car dollies to push it around the shop. I've also used them to raise up the car on the dollies to make it mobile and easy to work on. Probably won't work for a very large car, but with the size cars that I work on (Fiero/TVR/Puma) -- they work real well.........and were cheap to make.
I also have a kwiklift for "drive-on" service. And yeah, a full-on lift would be great, but this does just fine with the limited height I have in the garage.