Recognize your direct, one to one relationship with the Universe.
Society has interjected itself so completely into our minds and heart that we have lost sovereignty over our lives. In reality there is a fundamental connection between just you and life and there is nothing whatsoever in between. Get rid of all you have borrowed from outside sources and try to see life with your own eyes. The impact of this understanding gives one a sense of aloneness, not loneliness, and brings with it a sense of power and freedom essential to sustaining your spirit. You have been born into this universe, that is the only license you need in order to live your life according to your terms. Reflecting on death brings home this point. Being able to stand alone gives you immense strength.
Having a good sense of humor and a happy frame of mind is also going to play an important role in keeping your confidence up. The importance of having a sense of humor cannot be overstated, as you will soon realize that it is better to laugh at the antics of your mind than to take it to task or become demoralized.