Ben Franklin is responsible for so many of the services and things we have today. One interesting concept he developed personally was his approach to refining human virtues. He made a chart on paper and would practice daily one of the virtues at a time for a specific period, always trying to keep it top of mind and help it become habit.
He would go through all thirteen of these virtues, then start again. He began this when he was 20, and even kept up on it during his sea travels to and from England. The thirteen virtues are: