1. Think positively
2. Focus on your pluses rather than the minuses
3. Relax
4. Learn to feel good about yourself
5. Stop comparing yourself to others
6. Reward yourself from time to time
7. Smile
8. Posture - body language
9. Change how you think
10. Say YES more often
11. Make wise choices
12. Listen to happy music, happy people
13. Try something new
14. Set goals, however small, and focus on achieving them
15. Overcome your fear - fake it until you do
16. Create
17. Learn from your past
18. Improve your social skills

Just some notes on boosting one's confidence. Sometimes you need to mentally tell yourself that you are worth it :)