Similar to investing, peer-to-peer lending is where you loan money to someone else, and they pay you back with interest. The great thing about peer-to-peer lending is that you can lend as little as $25, and your loan will get bundled into a bigger loan for the borrower. Each month, they'll pay you back principal and interest. You can snowball this initial investment into many investments because you get your principal back as well each month. Many lenders earn over 5%-7% on their investments. Check out Lending Club to get started.
Do you have stuff in your garage that you don't use anymore? Maybe a bicycle or camping gear? Maybe it's something that you do use, but not very often. If you want to put your stuff to work for you, consider using a service like Rentything, which allows you to rent almost anything you own. You just create your own rental shop and list items to rent. People contact you and pay you online through the platform. A simple and easy way to boost your income! A similar site is Zilok.
Busy professionals outsource their laundry more often than you would think. If you live in a dorm or apartment building, you could offer to start a laundry service for all your friends and neighbors. Instead of them having to make their own trip to the laundromat, you could combine their trip with yours, and charge them a small fee for it. Considering you do laundry each week, this could be a great recurring revenue stream.
Apply for new scholarships and grants. A lot of students think that they are only eligible for funding when they initially apply for admission. This is a mistake! There are often new scholarship opportunities for upperclassmen, though they aren't always widely advertised. You may also be able to apply for external scholarships or grants, which are offered from groups outside of your school.