Your last job may well have been a nightmare but nobody needs the full story. Get it down to two or three sentences about what the problem was and why you left. Be philosophical about it, not bitter. It is OK to have a bad experience at work, it is not OK to be a miserable person to interview because of it.
Know your strengths, skill set, how you add value, what makes you different or better than your peers in the industry. Know what is in your CV. If you are asked about something in your CV then be prepared to provide more detail on it. Never look at your CV to remember what you said or what your results were – know your own stuff!
Do your research on the company you’re interviewing for. Go visit a branch, customer or franchise. Check the Internet. Our clients expect that you will have made an effort to find out about them and discuss it at the interview.