Maybe I'm a bit of an odd ball then ... my shed's reasonably clean, I think the sink with running water helps. I have some very tasteful blue lino on the floor and make a point of wiping up every spill. The "shelves" where the storage barrels sit are covered in sheet PVC and drain into a piece of guttering, from which I can drain any spills (think it's shown on the wiki.
Nathan, you're right about pumping everything. Incoming oil is pumped out of cubies and metal drums with the Mono pump. It's self priming and will deal with small lumps and fats without problem.
mate - u got a link for mono pumps? How much are they?
btw Think I'm goin a bit pump mad at the mo, got a couple of stuart pumps off Steve (drying solution?), 3 x 110 lpm pumps from Glenn aka JGS (2 for processing and 1 for glyc washing etc?), a gear pump (on polish and dispense - might put another gear pump in for filtering feedstock - not sure if there's any value in this), a tam on my polishing / dispensing drum and a big B&Q pump which should be fine with oil, but not bio (not sure on a use for this yet).
Reckon that I will only have two tanks in the shed, one will be a processor - hopefully 450 litre SS, and one conical for dewatering etc. My final polish tank will stay in the garage to make dispensing easy.