From Twyla Tharp’s book, The Creative Habit:
For every project she begins, she takes out a cardboard banker’s box, writes the name of the project on the box, and begins to fill it with all of the materials she’ll need for that project. To begin, she takes out a 3×5 note card, and writes her goal or key concept for her project on it, and throws it in the box. As the box fills and the project moves forward, she often refers to this card to see if she is on course.

Great Idea. Moving bankers boxes is so orderly.