Simplify. When you work at a specific project or activity, simplify it by breaking it down into its component sections. Don’t set goals that are too far beyond your reach. Unrealistic goals create frustration and invite failure, which can make you doubt your abilities. The success of attaining each simple goal will generate motivation that propels you along in the process, and you won’t suffer the mental fatigue you experience when you bite off more than you can chew.