Post-Interview

Hello,

This is my first post here, so go easy on me. I could use some advice. Today, I had an interview at an Apple store for a retail position, somewhere in the West coast. I felt very confident with the interview, and felt it truly went well, and I'm not sure if I should email the interviewer tonight and thank her, or wait until tomorrow? Tonight seems more timely and prompt, but tomorrow it may "remind" her of me and make me stand out? What should I do?

As you can tell, I'm new at this and OBVIOUSLY really want the job, but I don't want to mess anything up!!

Thanks!