Arrive on time: Punctuality in the interview process is a non-negotiable. As discussed here, there is a such thing as arriving too early (though it won’t hurt you, it will probably just be a little awkward to wait so long). The optimal time to arrive is probably around 10-15 minutes prior to an interview. If you are running late due to an unforeseen event, traffic jam, etc. make sure you call and email to let your interviewer know.