Whenever you go out-of-doors, draw the chin in, carry the crown of the head high, and fill the lungs to the utmost; drink in the sunshine; greet your friends with a smile, and put soul into every handclasp. Do not fear being misunderstood and do not waste a minute thinking about your enemies. Try to fix firmly in your mind what you would like to do; and then, without veering off direction, you will move straight to the goal. Keep your mind on the great and splendid things you would like to do, and then, as the days go gliding away, you will find yourself unconsciously seizing upon the opportunities that are required for the fulfillment of your desire. Advice from Elbert Hubbard

The way to develop self-confidence is to do the thing you fear to do and get a record of successful experiences behind you.