Doing a script breakdown is a very useful – and often overlooked – step in the preproduction process. It’s used primarily for film production, but is equally applicable to photography (even though photo shoots don’t normally have an actual script).
The basic idea is to make a systematic list of what you need for each scene in your project. You do this in advance, and it helps stave off the last-minute scrambling for an overlooked prop or wardrobe element on the day of a shoot.
These forms are actually a bit hard to find, so I made one for myself. You can open it in Adobe Acrobat or Apple Preview, and type right on it. Or, print it out and fill it out by hand. Download the PDF here.