Do you lack self-esteem? You can feel better about yourself, and it's easier than you probably think. But there's a little-known fact you need to be aware of:
Your Inner Guide to Self-Esteem

Do you have parents or well-meaning friends that try to persuade you to do one thing or another for a career, but your heart tells you your path lies in another direction?
Sometimes You Shouldn't Listen

Does it feel that you have had a bad upbringing? Does this seem like a barrier to the fulfillment of your dreams, your career, your mission or calling? Do you think your circumstances hold you back? Read this:
A Slave to His Destiny

Here's a conversational chapter on optimism from a future book:
Conversation on Optimism

If worry is a problem for you, or even if you would like to simply worry less even though you don't worry that much, you might like to read this:
The Ocelot Blues