Greetings!
It can be very hard to talk about yourself! You might pretend that you are writing about a friend--try to look at yourself as though you were someone else. What are your strengths? What are your accomplishments? What kinds of things do you like to do? If this is for an admissions essay, emphasize your best points. If it is a class assignment, follow the instructor's directions for the type of content. You could also ask people you know what they would say if they were asked to describe you. (Pick people who know you well and like you!)
Thanks, and good luck!
Sarah
EssayForum.com
Sarah, EssayForum.com