If you need to mark spaces or bits of gear we have multicoloured tapes. If you need to string something p or tie something down we have all sorts of super gaffer tapes. If you need to clean screens or filters or other surfaces we have all sorts of wipes and polishes. If you just need to get the actors to behave we have a bag of professional-quality rocks.
There's clapper boards. padded eyepieces for video cameras, and X-Rite colour cards to let you get the same look in each shot. You might advance from making inadvertent art to crafting deliberate science...
Here's a celebration of goodies on offer right now: