Don't buy into the old idea that the job applicant has to know how to solve every issue the company has. I remember reading job hunting books years ago, and they'd always say things like 'you need to have a plan for solving X problem the company is known to have.' I think that's just stupid.

Don't go with canned answers you get online either. Write out a few sample answers that are reasonable and honest. For example if they say 'tell me about yourself' you can say something about your interest in the beauty industry and how you've shopped at their store for years, maybe something about any education you have and why this job interests you besides the discounts. Your answer needs to be realistic even if you have to say something like 'what would you like to know exactly?'

Dress as nicely as possible which it sounds like you're planning on doing. I can tell you from my years of experience in working in offices that how a person dresses for an interview is about as nice as they'll ever dress, and it shows respect for the interviewer for you to dress up.

Be sure and get the interviewers name and send them a thank-you note saying you appreciate them taking the time to meet with you, etc., etc. You can find out how to write a nice thank-you note online, but do it.

Be on time.

Good luck.