I think it depends on what you're trying to do. In my case I couldn't be bothered studying for my exams, so I kept imagining what I would feel like if I failed them all, and that helped me get things done!!
당신 could promise yourself a reward, 또는 imagine what would happen if 당신 didn't do it, 또는 당신 could just grit your teeth and get on with it!!
