One of the most powerful concepts, one which is a sure cure for lack of confidence, is the thought that God is with you and helping you. This is one of the simplest teachings in religion, namely, that Almighty God will be your companion, will stand by you, help you, and see you through. No other idea is so powerful in developing self-confidence as this simple belief when practiced. To practice it simply affirm "God is with me; God is helping me; God is guiding me." Spend several minutes each day visualizing his presence. Then practice believing that affirmation.
Think enthusiastically about everything; but especially about your job. If you do so, you'll put a touch of glory in your life. If you love your job with enthusiasm, you'll shake it to pieces.
The mind quickly responds to teaching and discipline. You can make the mind give you back anything you want.