This week I’m considering a powerful tool for behavior change: the humble checklist. The oldest historical example of this writing genre may be the Sumerian King List from 1800 B.C., but people were likely using lists even earlier for mundane tasks connected to record-keeping and trade. Benjamin Franklin tracked his progress in developing moral virtues using an elaborate list system. The popular FranklinCovey planner system therefore takes its name from America's first ambassador. Checklists in their current widespread form also benefitted from the advent of mail-order catalogs in the mid-1800s, which encouraged consumers to list the items they wanted ( Franklin also had a hand in developing the first printed catalogs!). Lists helps us to keep track of things that we might otherwise forget, to put things in a meaningful order, and give us permission to drop things from our memory when we don’t need to remember them any longer. A checklist has two essential features...