I was always looking outside myself
for strength and confidence,
but it comes from within,
It is there all the time.
                   --- Anna Freud
(via ImageHarmony.com)

Self confidence is the difference between feeling unstoppable and feeling scared out of your wits.  Your perception of yourself has an enormous impact on how others perceive you.  Perception is reality - the more self confidence you have, the more likely you'll succeed.

Ten strategies you can consciously do to build self-confidence:

1.  Dress Sharp
2.  Walk Faster
3.  Good posture
4.  Personal commercial
5.  Gratitude
6.  Compliment other people
7.  Sit in the front row
8.  Speak up
9.  Work out
10. Focus on contribution
(Extract from www.pickthebrain.com )