Meditation is a practice that will help you have greater control over your thoughts and your mind. With time and practice, you can choose to stop the busy mind, or clear and focus it for productivity or a great game of trivia.
There is a lot of research on meditation and on long-term meditators that shows the physical and psychological benefits of having a regular meditation practice. Some benefits, among many, include lowered blood pressure, decreased anxiety, better sleep (reduced insomnia), decreased depression and increased ability to handle stress.