How do I be/appear more high class, pure, disciplined, graceful?

haircut

clothes

>>18621048
Look clean and dress nice.

That's about it

>>18621052
Ignore appearance, I want personal change.

t. no more cigarette smoking because it is bad for me, no more eating excess food.

>>18621059
For me being classy would be being rational in all situations.

For starters try to sit and stand upright. You will achieve better posture with certain exercises.

Take the time to be more well spoken and learn to minimise your body sounds.