Savvy job seekers know arriving at a job interview a few minutes early is the best way to start off on the right foot. Chilling in the reception area gives you a chance to warm up for the interview by looking over your notes and settling your thoughts. You may have shown your ability to be punctual, but don't put in a dent in the clean first impression by letting your nerves get the best of you.
Sitting and waiting gives an interviewee plenty of opportunity to showcase nerves — the leg shaking, nail biting, hair twirling, foot tapping, etc. Interviewers expect that applicants will be nervous, but do your best to curb those obvious clues while you're preparing for the interview. You want to present yourself as a confident candidate, not an anxious mess, so be mindful of your mannerisms in the waiting room for a strong start.