The remarkable, Orwellian "Brazil, " which he co-wrote and directed in 1985, is still a classic case of visionary filmmaker vs. shortsighted studio (or, if you're a studio executive, clear-sighted studio vs. enfant terrible).
Tell yourself you'll do 20 push-ups in the next five minutes (a specific stretch goal) vs. five push-ups (non-stretch) or the vague idea that you'll do as many as you can.