I read somewhere that doctors prescribe their patients to undergo what we call "ecotherapy" for those suffering from depression. Ecotherapy promotes good mental and as well as physical well-being. It is practiced by simply engaging one's self in outdoor activities surrounded by lush greeneries or a green environment. Ecotherapy is actually a combination of ecopsychology and psychotherapy. Communing with nature offers positive mental health benefits simply because it makes one feel relaxed, soothes his senses, and can forget about his troubles for a while. You can do this by taking a walk in the nearest park where there are many trees and plants or there could be an eco-park within the vicinity of your city or town. I believe for those undergoing treatment or taking the road to recovery from any addiction can also benefit from undergoing ecotherapy and it will not actually cost much unlike other formal treatments.