From an unknown Author, here are 10 suggestions to help you develop and maintain a healthy self-image.
1. Hate your sin, but never hate yourself.

2. Be quick to repent.

3. When God gives you light, walk in it.

4. Stop saying negative things about yourself. God loves you and it's wrong to hate what He loves. He has great plans for you, so you're in conflict with Him when you speak negatively concerning your future.

5. Never be afraid to admit that you've made a mistake and don't always assume that when things go wrong, it must be 'my fault.'

6. Don't meditate excessively on what you've done, right or wrong; both of these activities keep your mind on you! Center your thoughts on Christ.

7. Take good care of yourself physically. Make the best of what God gave you to work with, but don't be obsessed with your appearance.

8. Never stop learning but don't allow your education to become a point of pride. God doesn't use you because of what's in your head: He uses you because of what's in your heart.

9. Realize that your talents are a gift, not something you have manufactured yourself; never look down on people who cannot do what you do.

10. Don't despise your weaknesses; they keep you dependent on God; so give Him thanks!

Plus these words of wisdom from The Imitation of Christ by Thomas a Kempis:
"Without the Way, there is no going. Without the Truth, there is no knowing. Without the Life, there is no living." God speed!