We can improve Self Confidence by the following steps,

If we meet the other people then we can increase our self confidence, because when we communicate with the others then our speaking hesitation will be decrease.
Education and experience is very helpful to increase the our self confidence
For the practice to improve self confidence, it is great source of increase the self confidence
We should always believe in Allah, and do not considered others less then us.
To Increase self confidence, we should always try to improve our performance it will be help us, to improve our self confidence. We should always focus on performance.