"Keep a symbol of your hardest decision visible Woodrow Wilson agonized over leading the United States into World War One, knowing it would cost tens of thousands of American lives. The guide recounts that Wilson kept the brass casing from the very first artillery shell Americans fired at Germany on his bedroom mantelpiece until he died, because "he felt such responsibility — he knew the consequence of him leading the nation to war meant it was going to be a huge tragedy for so many American families." Placing a physical reminder of your most consequential decision where you see it daily creates an ongoing moral accountability that abstract regret cannot replicate. Source: Tour Guide (unnamed), Prohibition History Lecture, Temperance and Prohibition Tour Presentation"