Learn. 

Patients are always concerned about their posture and want to “fix it”. As a chiropractor its honestly the number one question I receive in practice. Posture is a funny concept, as people often believe it's to do with standing straight up. In reality everyone has slightly different anatomy which gives some wiggle room for variances in good posture. Tip: Rule of thumb is to have the EAM (your ear canal entry) to line up with the middle point of your deltoid (Middle of shoulder