This video by Meditative Mind will help you reach a deep state of relaxation where you can focus on your breath and simply be at peace.
The frequency being used is 777 Hz, which corresponds with theta brainwaves which are associated with deep relaxation.
As you begin to relax, try imagining white light coming down slowly from above and filling your entire Self down to your toes.
Breathe and smile inwardly as this frequency bathes you in peace and tranquility. Feel free to drift off to sleep if your body needs it, you will awaken refreshed and rejuvenated.