For every show that I do, I have a written set list. I know my show, but I always have one. For my main show, it’s taped to the inside of the lid of my case. Recently I was in a show where I did three five minute spots, so the list was written on a piece of paper inside the bin on my table top.
I do this for a couple reasons, for my main show if I’m repacking it, it’s easy to go down the list as I pack to make sure I have all of my props. For unusual configurations of my show, it makes sure I have all the correct props set. It also takes brainpower out of what I’m doing, I can glance at the list and know what to do!