The technique of breathing to be followed for fast results needs personal guidance from a person who is an expert in the field. Nevertheless, there are simple techniques all can follow. Here is one of them.
One has to sit on a flat and firm surface facing North or East. If sitting crosslegged which is called Sukasan is possible, it is good. If unable to sit crosslegged on the floor, use a flat surfaced and firm chair.
Rest your left hand in your lap and straightenup your spine, with the head held gently firm and chin parallel to the ground.
Now bring up your right hand near your face, close your left nostril by pressing with the ring finger gently but firmly. Draw breath up your right nostril to a slow count of five. Hold the breath inside to a count of ten closing the right nostril by pressing the thumb of your right hand and slowly exhale through your left nostril to a count of five.

Repeat the process starting with your left nostril and then breathing out through the right. When you finish breathing through both nostrils, it is counted as one pranayam!

Continue and repeat five times once in the early morning and a second time during the late evening. Practice the technique until you experience pleasantness in your Mind and body.