[Dave at Pelican Parts]

You could also use one of those tin drip pans from your FLAPS. I got mine at the Pep Boys just around the corner for pretty cheap.

I actually only use mine for oil changes (since I tend to drop oily drain plugs and so forth; it makes cleanup a lot easier). You could either go through the trouble of putting it down and picking it up every time you park or leave, or you could just be careful when you pull into or out of the garage and leave it down the whole time.

Cardboard is probably better for leaving down the whole time, though, since you don't really care if you drive over part of it.

--DD