Meditations are powerful techniques for complete inner wellbeing. If one is able to keep the body still then the mind also becomes still. As you meditate and become meditative your mind stops to rule you. You start to rule the mind and that leads to doing what you choose to do with it.
Learn a simple 15 minute meditation. Stressed at work? Need to prepare for a busy day ahead? Grab a chair or just sit on the floor and go through the instructions.