The number one rule when going into an interview? COME PREPARED. I utilize Monster.com for tips on creating an attractive cover letter for a specific job and, of course, the site provides information about current job openings.
Here ‘s a link to 10 tips to live by when preparing for an interview: http://www.monster.com/career-advice/article/ten-interviewing-rules
Another link to 12 surprising tips (and, yes, I did find some of these interesting) for job interviews: http://www.forbes.com/sites/jonyoushaei/2014/10/20/12-surprising-job-interview-tips/#58ec62643006