1. Give a firm handshake
Ladies (and gents), a firm handshake makes the best impression on an interviewer. As an interviewer myself, I am far more impressed with someone that gives me a firm handshake. I asked around to my superiors, and most said their first impression on me was stronger because I gave a good handshake. It's actually been proven that women do better in interviews if they give a firm handshake. (Seriously. Google it.) Remember though, there is a difference between a nice, strong handshake, and causing physical pain. Pain = bad.
2. If you can get off topic with the interviewer, do it.
Not saying you should talk about the weather, but if the interviewer states anything personal about themselves, jump on the opportunity to talk about it. This takes it from being just another interview to "Oh yeah, I remember that one." To get this position I got in a detailed conversation about ladybugs. Seriously. Ladybugs.
3. Ask serious questions
Don't ask generic questions like "What is this subject" or "how did that start?". If they are questions you can answer in Google or off of a company page, don't ask it. Instead, ask questions about things you can't find online. Here are some examples:
- Ask the interviewer what they like most about the job
- Ask the interview what they like least about the job (this is a very good one to ask)
- What is a day in the job like?
- Are there company outings / group activities?
- Is there opportunity for advancement in the company?
I know it sounds weird, but (men) if you are deciding about whether to wear a tie or not, do it. Ladies, instead of your favorite shirt, why not your nicest one? You may not be hired into a position where you need to dress up that much, but it makes quite an impression on your interviewer.