I guess all the professional crews probably have something similar (or better), but alas I'm not a professional and I "borrowed" one of these from work to help with cleanup.
This made a fantastic difference to the cleanup, being able to scoop large quantities out of the bathtub and paddling pool, and its brilliant for scraping+collecting fresh splatter off the walls/floor too. (it'll scrape a flat surface almost clean in 1 pass, only requiring a quick wipe after.)
I guess there's loads of other neat tips and tools out there worth knowing about too?