Thirteen Virtues Tracked One Weekly
Franklin listed thirteen virtues and planned to give each one a week of strict attention, marking daily lapses in a small book ruled into a grid, so that a full course would take thirteen weeks and could be repeated four times a year. The idea was to isolate one habit at a time and record faults daily rather than attempt reform all at once. He reports that in practice he went through the course less often, was interrupted by business and travel, and eventually left it off, though he credits the attempt with making him better than he would otherwise have been.