I recently read Stedman Graham's book Identity (and have reviewed it for you also) and thoroughly enjoyed it. The book talks about knowing yourself, and how this can help you achieve success in life. Graham says you can think of your identity as your personal brand, and I like this way of looking at it. No matter who you are (famous or not) you represent something in this world. Who you are is important.
It's also something that shapes your friendships. You will attract people that are most like you, so it's important to know what type of identity you show to people. It has to be genuine, too. You can't fake it when it comes to showing the world who you really are.
One tip Graham gives to help determine your identity is to try to write a ten-word want ad for yourself. What would it say? Since ten words isn't very much, you have to choose the words carefully. It's a good exercise in defining your character.
Have you read Identity? Feel free to give your own review (just click the blue "write a review" link at the top or bottom of the page). Let others know what you thought of the book as well.