In a nutshell, Prep-Do-Review calls on you to think of every activity not as one step — doing — but as three steps: preparing to act, acting, and then reviewing the outcome. It works this way:
Prep: Before you do anything, prepare. Ask yourself questions like these: What am I going to do? Why — what’s my goal or purpose? How will I do it? Who else will be involved or affected?
Do: Do what you prepared to do.
Review: When you’re done, think about what you did and what happened. What did you learn? How would you do it differently next time? (Don’t assume the right lesson is obvious; it often is not.)