Looking after yourself
Make lots of friends
Even shy people can have an active social life. Get out and meet some new people, and remember - they don't have to be identical to you to be good friends.
Learn how to handle stress
Don't be afraid of challenges, overcoming them will help to increase your self-confidence. Learn some active techniques to help you relax, rather than monging out in front of the telly, or getting drunk.
Big yourself up
If you're in the habit of putting yourself down a lot, try making a list of all your good qualities.