Life is getting so busy that one finds it practically impossible to have time for ones own self. Strange but the truth. And this has led to depression becoming a common part of our lives. Obviously, if any such phase occurs in anyone’s life, one should do every possible thing to do away with it, be it external help or guidance. But then, nothing at all can supersede the power of yoga in killing depression. Yoga helps you to connect withyour inner self, helps you to listen to your inner call, your mind’s your body’s call.
Yoga, is a very wide therapy and can not be presented in water tight containers. Yet, to summarize it contains asanas, pranayama, all these help people to get back to their real selves, cope up the problems- physically as well as mentally, and most importantly emotionally. 
Some of the very popular and effective techniques are:
Yoga poses
The different exercises and poses of yoga help you handle your body and mind in a balanced and beautiful way.
Breathing techniques: one can live without eating for few days, without water for few hours, without breathing….hardly a few minutes. Breathing techniques are the most effective way to combat many emotional as well as physical problems. It helps you live in the present and be focused.
Surya namaskar is the most respected and effective program of yoga.
Various Asanas
Standing poses
half moon pose, forehead to knee pose, toe to hand pose, mountain pose, palm tree pose, triangle pose.
Sitting poses
Cow face pose, forehead to single knee pose, forehead to both knees pose, lion pose, Wheel pose, fish pose, boat pose, wind relieving pose, cobra pose, bow pose, sarvangasana, eagle pose, tree pose.
Pranayamas (breathing exercises)
For skull cleansing, practice kapalbharti, bee breath, alternate nostril breathing.
Diet
So, these were only some of the yoga programs. But then apart from these practices and programs, it is also very much important to know the correct yoga diet. Your diet should be purely vegetarian only, called as sattvic. Eat plenty of fruits, green vegetables. Avoid fried, fatty foods, they adversely affect our mind. It is advised to walk in open air, listen to good music.