Along the same lines as trivia, you can get paid for just using your mobile phone and allowing companies to know what you're doing on it. For example, Nielson Mobile Panel is an app that you can earn rewards on just for having it installed. It will take snapshots of what you're doing and use those for advertisers to know more about your demographic. It takes away some privacy, but you get paid for it.
This is a very unique idea. You can earn money by creating and selling your own T-Shirts! All you need is a photo editing software for creating designs, and a little investment on your part. Create interesting event-related t-shirts, and prompt people attending those events to buy them! For example, you can create shirts for seminars, social events, parties, etc. It’ll take some money to initially produce those T-Shirts, but you can sell them at a profit to gain more than what you spent! A friend of mine started with this idea, and now, she has a small business and a brand with a website, where people can choose from the available designs, or order a custom-made T-Shirts according to their desires! Great huh? Who knows it could evolve into a full-fledged business for you?
Now, this is for students who have a strong desire of entering the entrepreneur world, one can begin a startup of his own with a group of people or alone. Many students did start their businesses in their college life. This can either be a success or a lifetime experience. Developing an Android application is the best form which has even made people millionaires. You can also begin with the website development, or there are various programs being held in colleges which involve interaction betwixt students and businessmen, who aspire to learn about idea students, have and do pay for a good business idea whilst making an investment into the same. Getting associated with a startup also works well, taking an instance from my own life, I got into Business Alligators in my second year of graduation.
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.