Become genuinely interested in other people.

If you can't sleep, then get up and do something instead of lying there worrying. It's the worry that gets you, not the lack of sleep.

If you want others to like you, if you want to develop real friendships, if you want to help others at the same time as you help yourself, keep this principle in mind: Become genuinely interested in other people.

When you face a problem, solve it then and there if you have the facts necessary to make a decision. Don't keep putting off decisions.

Millions of people have wrecked their lives in angry turmoil, because they refused to accept the worst; refused to try to improve upon it; refused to salvage what they could from the wreck. Instead of trying to reconstruct their fortunes, they engaged in a bitter and "violent contest with experience"- and ended up victims of that brooding fixation known as melancholia.

If you increase your success by even a mere 10 percent, you have become 10 percent more effective as a leader than you were before.

If half a century of living has taught me anything at all, it has taught me that nothing can bring you peace but yourself.