Deep breathing is a form of meditation that helps decrease stress, improve memory, treat depression, promote better sleep and improve cardiovascular health. There are numerous breathing methods that help focus on specific needs. One technique for you to try is 4-7-8 breathing developed by Dr. Andrew Weil. Breathe in through the nose for 4 seconds 2) Hold for 7 seconds 3) Breathe out through the mouth for 8 seconds Repeat 4-5 cycles to promote a clear, calm mind.