Don’t forget the camera.
People do worry what sort of camera they have, or indeed I have. Ok it’s a good camera, with lots of pixels, and an expensive bit of glass on the front! However it’s only a light sensitive box with a hole at one end to let light in, and sensitive material at the other.
Ok it does have lots of nice buttons, most of which I never use. In fact in the studio the camera is the tool I mostly use at the very end to capture all the lighting and composition and fiddling I have been doing, and I never take it of manual. This is the bit I charge for getting the lighting and composition and creativity right… oh and I use a good camera!