We all remember those important items when using a studio. For example the camera, batteries, lens, memory cards, tripod etc. What about those other items that will help to make your shoot a success?
Do you have blue tak in your bag, what about the masking tape for marking out, do you need a spirit level for accuracy. Have you checked if the studio has an iron and ironing board for that fashion shoot?
Do not rely on all studios having these sundries available for you to use. Build up your own box of tricks, I have seen too many times where photographers are having to shoot out to the shops to get such items, wasting both time and money.