Make sure to show up on time, don't complain, and be professional. If you show that you care and respect their time (employees and customers), they will respect you. When applying for the job, I had to wait two weeks before they got back to me and I missed their call to schedule an interview. I called them back and when that didn't work and I came in person to sort things out. They like that because it shows that you actually care about the job. I had the interview right then and there and got the job.