As taught in Yogasutra, the practice of smarty upa sthana(Buddhist) takes many forms, the details of which are taught in personal instruction. Himalayan tradition teaches the method of asanas coupled with full awareness of the states of body, breath and mind in a detailed methodology. In fact a major component in the practice of postures is self awareness, a deep self observation, in all states of body, breath and especially mind.
It starts as part of mindfulness and becomes specialised as the very first step in the practice of meditation. Here it is essential to learn diaphragmatic breathing that is slow, smooth, without jerks and without a break between the breaths.
The practice of breath awareness branches off into many other modes of meditative experience.
Four bad habits of breathing that need to be avoided:
Mind, your true nature is light. Recognise your origins. The great Lord is always in your company. Do colour you with the wisdom of Gurus. Only the mind that recognises its roots comes to know the true meaning of death and life.
Book by Nisargadatta Maharaj
Book by Ramana Maharshi
Book by Swami Rama
Book by Swami Rama
Book by Swami Sivananda
Book by Swami Vivekananda
Book by Alan Hymes, Rudolph Ballentine, and Swami Rama