Short, sweet, and to the point. Clear writing, and therefore clear commands, comes from clear thinking. Think simple.
The brain is where most people really screw up.
What's the worst that could happen?
Learn to be difficult when it counts
You think you're fatigued, therefore you can't exercise. In fact, you choose not to move, therefore you feel fatigued.
You can enjoy stargazing just by going out and learning a couple constellations with your kids.