How to have better posture
It made me
straight-backed 
"Finally accomplished this, and it was so worth it, too! No more neck and back pain, and I don't feel weird looking at my posture in pictures anymore."
How I did it: A while back, my chiropractor suggested I do some neck-muscle exercises to straighten up my posture. These are accomplished by standing straight with your back against the wall, and slowly tightening your neck muscles and bringing your head back against the wall.
Always look straight forward when doing this, and only do 10-20 of them per session, and only 3 sessions a day at the most, else you'll have a severely sore neck.
Resources: A good, knowledgeable chiropractor.
