One video I’ve been thinking a lot about is this video over at BigThink. It’s a simple premise: When your body tells you to quit, you’re only at about 40% of your total capacity. That means when you’re ready to give up, you still have 60% left in the tank. So next time you’re working on a project, working out, or just can’t seem to push anymore, know that you’re only at 40%. You have more than half left in you.