Many times you may finish a shower only to realize how much better you feel. Dressing nicely also will help build your self-esteem.
Ironing your clothes and keeping them clean are positive ways to generating a better feeling about yourself. Sometimes a new outfit that fits just right can also make you feel good about yourself. People will make assumptions about you based on how you dress.
Thinking positive and eliminating negative thoughts are ways to improve your confidence around people. Believing you can deliver that presentation at work, and killing the negative thoughts that you cannot, will steer you towards success.
Telling yourself you have something smart to add to a conversation at a party will have people listening to what you have to say. In addition to thinking positive, you should act positive.