You should have the courage to accept yourself. Remember, that if you do not accept yourself no one will. People often try to appear strong but in order to deceive themselves and other, they get frustrated, and therefore, you should accept the truth.
You should also take maximum care of yourself and you should shape up your body. Take proper rest and do exercises. This will not only make you stronger from the inside but outside also.
You should always try to think positive and be optimistic.
You should list down all you positive traits and jot down things you consider important in the accomplishment of your goal. Having your positive attributes in your mind not only makes you confident but also allows you to overcome your deficiencies.
You should not underestimate yourself and think of yourself as a strong person. Of course, you should limit the imagination of your strength and keep it close to the reality. You should also note down all the points that a strong person entails as this will make things easier and you will know what more you have to achieve.
You should increase your interaction with peers and express your thoughts as sharing will give you the courage to speak freely in front of other people.