to improve self motivation you must first STOP thinking negative thoughts about yourself. you must tell yourself that you are good enough and believe it. if you are going for a job interview you should try to remain relaxed and be confident.
It can either motivate or discourage you as harder it is the more your motivate to beating it when the easier it is the more you feel you want to go to another sport because of easiness
remember your strengths and talents (if you're a good artist, good mom, good at a certain talent..) things you take for granted(healthy body, safe limbs, safe teeth..) remember it and don't keep...
Improving self-confidence can be either very difficult or very easy, usually depending on how far you have fallen; and the nature of the person. Some people (me included) improve self-confidence...