How to breathe in your day to day live? Focus on the following points:

Nose - when possible breathe in and out through the nose.

Slow - keep a slow breathing rate.

Deep - actively using the diaphragm as opposed to pulling the shoulders upwards. Allow for expansion in all directions.

Less - breathing in less air, reducing the volume of air going into the lungs and allowing for a natural, unforced, break between the exhale and inhale.