This is an update of Maury‘s update of fran’s post.

Good luck getting one of those coveted library desk jobs tho lol
Looking for a job? Here are some tips on where to look, who to ask, and the logistics of being a student employee.
What is work-study?
This is a quota that is included in some financial aid awards, and you can find out if you have it by checking your financial aid award letter. It’s an amount of money that the financial aid office expects you to work in order to contribute to your tuition. Some jobs on campus are work-study only since wages will be subsidized by the financial aid office or/and the federal government. This is beneficial for departments who are working on a limited budget. The wages you make from these jobs will be deposited into your bank account, but the financial aid office expects (although doesn’t require) you to use them to directly pay your tuition.
Work-study jobs will generally be marked as such, but if you have work-study you can earn that money at any campus job (whether or not it is marked as “work-study”). There are also certain volunteer opportunities on campus, like tutoring at Traverse Square, that work-study student can be paid for.
Important note: if you’re in a work-study position, you can only work for the number of hours your work-study allotment allows. If you exceed the number of hours it’s up to your supervisor if they want to continue employing you.
What if I’m not on work-study? Worry not, there are campus jobs available for you as well.