Internships, and check with the CS dept and see if there are any things you can work on. My school had a letter and arts class that basically allowed us to work

Internships, and check with the CS dept and see if there are any things you can work on. My school had a letter and arts class that basically allowed us to work on projects freeform with a mentor, either from the class or from the university on projects they needed help with. I ended up doing a stats project for the medical school to help them monitor grades and help students that were statistically falling behind their cohort.