Last year my wife bought me some of those anti-fatigue neoprene floor mats. I do all my work on concrete, either in the basement or the garage. This year she got me a couple more packs, which is way more than I need, but I'm not about to tell her.

Anyway, It occured to me that they're the perfect padding to set your cabs on. They're soft and lock together in any shape so you can make them the size you need, and they don't take up much space when not in use. Harbor Freight sells them $9 per set of 4, which is about 16 square feet.
