Going to graduate school is a big decision and figuring out how to pay for graduate school is an even bigger one. The difficulty of figuring out how to do this is usually what dissuades people from actually going to graduate school, or applying in the first place. However, going and getting an advanced degree in what you really love to study is not only helpful to your future career, but also to you as a person. So while it may be tough at the beginning, consider some of the suggestions below as to how you can pay for graduate school, so you can become more educated, benefitting yourself and those around you.
If you ask your employer for a raise so that you can buy a new car, they're usually pretty hesitant unless they really think you deserve the raise. However, if you go to your employer and tell them you have been admitted to graduate school and want to become better at your job, in turn becoming a better worker for them, then many times they will help you pay for it. At the very least, there is no harm in asking.
While you probably just finished paying off your undergraduate student loans, you should at least investigate how much the monthly payments would be to take out another round of student loans for graduate school. As graduate school is usually less expensive than undergrad and you won't be paying for room and board through the university, it might fit within your budget.
When you decide you want to go to graduate school, pick a handful of schools you want to apply to and also find out how much they cost. Then, before you even apply, start saving for grad school so that you aren't financially strained while you are working a job and trying to learn at the same time.