Find a hero who can inspire you when you are discouraged. It helps to remind yourself that even the most successful people suffer setbacks. Be aware of things that could go wrong. Consider all the possibilities available, so that when the inevitable problems crop up, you'll be ready with solutions. Vary the time of day at which you perform your tasks.
Energy levels vary for people during the day.
Some work best from 5 a.m. to 12 noon, others from 4 p.m. to 2 a.m. If you find your concentration lagging, then change when you do that particular task, and rearrange your priorities accordingly. Using your optimal energy times will increase your productivity and, in turn, keep stress levels and negative attitudes in check. Make silly or outrageous bets. Bet a friend that you'll complete a task by a certain date, or before he will, or better than he will.