Do some research on the company’s website; look up who you’re going to be meeting, and what they do. It’s also worth stalking them a little on Linkedin (snapchat for grown-ups). Find out whether you’ll be working together, show an interest in what they do, and ask what they think of the company. Don’t be a muppet. Wear a suit, wear a shirt, polish your shoes and do up your tie. It sounds stupid, but it’s a sign of respect. Even if the company is a groovy tech start up, still make an effort for the interview. Play the game and show the interviewer that you can scrub up nicely when you have to. Read up on your CV. Are there any gaps? What questions are they going to ask you about it? If you can anticipate these, you’ll come across as cool and collected. If you don’t, you’ll look like someone who simply hasn’t prepared - or worse, a liar.
Some companies like to use little tricks to weed out the unsuitable. Don’t fall for them. A common one is to offer a different role which doesn’t actually exist. Question: I know this is a sales role, but how would you feel about something in marketing? Would that appeal to you? WRONG answer: Sure, I’d be happy with that. Nope. There never was a marketing role; this is just to see if you actually want this job, or if it was just any old job you were after. Correct answer: That does sound interesting, but I’m much more excited about the sales role which was advertised, as it’s a much better match for my skills. (Then give a couple of specific reasons why the job role you’re after appeals to you).