Learn to follow the quiet voice within that speaks in feelings rather than words; follow what you 'hear' inside, rather than what others may be telling you to do.
Don't be an extra in your own movie. Move out of your comfort zone. Don't be afraid of feeling uncomfortable or awkward. Step-out and make it happen.
When you're feeling down, did you know that you can change it in an instant? Put on a beautiful piece of music or start singing - that'll change your emotion.
You must strive to become much less susceptible to influences outside of yourself and much more inclined to trust the instincts and feelings that lie within you.