Jerry Seinfeld, Productivity Guru

To become a huge star by creating a show about nothing, you have to know a thing or two about personal motivation. What works best for Seinfeld, it seems, is putting up a wall-sized, year-long calendar so that you can get the satisfaction of—and motivation from—crossing off days in which you've finished a certain, important task (in his case, writing). After a while, you wont want to break the beautiful chain of Xs you've built up, thus providing further motivation to keep your routine going (via Lifehacker).