Accepted two part time offers while I'm in University, what should I do?

Hey yall,

So I recently went around a local mall near my university to get a part time job during school. I got an offer from two retail places. One gave me the job during the interview so I didn't really have the chance to tell them that I couldn't accept just yet.

I had an interview yesterday with another retail store and they also gave me the job after the interview. I'm planning on accepting the second offer, but what should i do about the first job? I have not gone in yet but my first shift is set for this Thursday. Should I tell them now that I unfortunately won't be able to accept the job, or should i work the shift and see if i like it since I'm not 100% sure which job I want yet?

Any advice would be appreciated, thanks!

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official