If you have had retail or service jobs, it likely will not impress a potential employer nearly as much as an internship. Of course, a lot of students have to take part-time jobs, but you should first try to find a paid internship. A professional development or career center at your college can help you find internships and might offer stipends to help with unpaid opportunities.
Mount Holyoke College recently introduced a program to give students stipends so that they could take one or more internships (Townsley et al., 2017). They found that along with GPA, the graduates with more internships had higher odds of being employed six months after graduation. A recent Gallup-Purdue survey also found that employers valued work experience more than a student’s GPA when hiring.