Being a college student and making money at the same time is difficult, but it depends on your attitude and flexibility to make this change. In addition to the above mentioned options, there are many other ways to earn money while studying. But the above listed ones are most common and tested by students worldwide especially in the United States and United Kingdom.
Do you enjoy fast food or going into retail shops? Many companies hire mystery shoppers to test the customer service of their stores. A common one is Subway, which hires mystery shoppers to ensure that "Sandwich Artists" are following all the franchise guidelines. If you have time and can travel to different places, this could be a good side hustle.
Creating Gigs on sites like Fiverr is a great way to get your freelancing career started. A gig is something you can do well, and are willing to do it for other people. For example doing programming assignments for somebody, making good quality sketches for somebody, etc. It could be anything! Indeed, if you head over to Fiverr right now, you’ll see a wild assortment of some of the craziest things people are willing to do! On Fiverr, you get $4 per job, which isn’t much. But there are ways to earn more than just that. Aside from Fiverr, there are other many alternatives, many of which pay more than $4. So if you can’t seem to sell your gigs at Fiverr, then try your luck at something else!
Search for freelance writing and editing gigs. The rates for these jobs vary: you may be paid by the word, be offered a flat rate for a project, or in some cases can be paid an hourly rate. You typically won't be able to retain copyright over your work or collect royalties, however. Even so, by doing freelance work you can build a portfolio and make valuable connections which may later pay off with more stable job opportunities.