I have got some tips from my experience so far-
-Never make your dream school your first app.
-Make your dream school the first school you research.
-Start thinking about career goals as soon as you can and discuss them with successful professionals in your choice of career.
-Discuss your career goals with friends who know about this sh**. It’s an added bonus if they enjoy putting you down and not believing in anything you say. Just argue with them till you win and then write your career essay.