The one thing you have control over is your thoughts and mind.

If you cannot control your thoughts then you sure won't control anything else
Mind control is the result of self discipline and habit. You control it or it controls you.

The best way to keep control of your mind is by keeping it busy with a definite major purpose. A major goal that you greatly want to accomplish. When you stay busy it is hard for your mind to wonder onto use less thoughts.

Where focus goes, energy flows!

When you control your mind, you can control your destiny. This is how the greatest fortunes and people are made.