Check out the availability of fellowships, traineeships, assistantships, etc. The best sources of information are the financial aid offices at the schools to which you are applying. Some universities will waive tuition for fellowship holders. Some of these are for one year and some are renewable. See the CRC fellowship section in the resource library.
Traineeships are awards from outside agencies usually administered by graduate programs.
The traineeship may or may not involve experience outside of academic work. Other places to look are your undergraduate office of financial aid, your undergraduate department, etc. Also look for state scholarships, to your parents' companies for possible awards, and awards available to minorities, women, children of veterans and children whose parents are deceased. Check with community organizations such as Elks and Rotary. Many students take on a job while in graduate school, but only as a last resort.