These are the questions you need to answer in your proposal/contract.
Project Title: Giving a title helps give you a purpose. Though you can change the name anytime.
Concept: What are you making? This gives you a target or a focus to develop for.
Why: Is the reason this is important. If you can't figure this out you need a new concept. This also helps establish a hierarchy in your image (Your three bears.) This can also help develop a foreground, middle ground, and back ground.