Stay focused on the positive things in your life. Your attitude affects how you present yourself. A positive attitude just makes you look better. Check out our blog post on this - http://career-dragon.blogspot.com/2013/01/a-positive-attitude.html
My family tells me they worry about me because sometimes the things they say bounce right off of me but the truth is I am an observer. I listen and pay close attention to the little things that interest me. I conceal my thoughts, go with the flow, and do my own thing.