Beyond keeping doors open, you can dedicate yourself to making doors open. Listen closely. . . Brainstorm job possibilities that match what you love to do. Next, elliminate choices from your list. Just pick up the phone and explain you are interested in their career.
Most people can spare a few minutes for a short interview.
Any time you get to choose a report topic, a book to read, or a class to take, consider making a choice that will help you learn about one of your career choices. Work, volunteer or serve internships in the career fields which look promising. Take seminars and workshops, as well as spend time reading books, which relate to your choices. Keep track of everything you do and get letters of recommendation when possible to increase your chances of entering your career with experience and references. Even a letter of recommendation concerning an unrelated job can establish your enthusiasm, reliability, and level of cooperation.