Myth #5: You should always keep your answers short.

????Here's where doing lots of research before an interview really pays off. "The more you've learned about the company and the job beforehand, the better able you are to tell why you are the right hire," Couper says.

????Don't be afraid to talk at length about it, partly because it will spare the interviewer having to come up with another question for you (see Myth #1 above) and partly because "in a good interview, you should be talking about two-thirds of the time."

Myth #4: If you've got great qualifications, your appearance doesn't matter.

????Reams of research on this topic have proven that physical attractiveness plays a big part in hiring decisions. "Anyone who says otherwise is lying," Couper says. "People care about your looks, so make the absolute most of what you've got." Even if you're not drop-dead gorgeous, it's impossible to overestimate the importance of looking "healthy, energetic, and confident."

Myth #3: When asked where you see yourself in five years, you should show tremendous ambition.

????The five-year question is a common one, and it's uncommonly tricky. "Interviewers want you to be a go-getter, but they also worry that you'll get restless if you don't move up fast enough. So you want to say something that covers all bases, like, 'I'd be happy to stay in this job as long as I'm still learning things and making a valuable contribution,'" says Couper.

????You might also consider turning the question around and asking, "Where do you see me in five years?" Says Couper, "Sometimes the answer to that -- like, 'Well, we'd expect you to keep doing the same thing we hired you to do' -- is a good way to spot a dead-end job."

Myth #2: If the company invites you to an interview, that means the job is still open.

????Alas, no. In fact, the job may never have existed in the first place: "Some companies use 'interviews' to do market research on the cheap. They ask you about your current or recent duties, your pay scale, and so on, to get information for comparison purposes." Another possibility, Couper says, is that "they may already have a strong internal candidate in mind for the job but just want to see if they come across someone better."

????If you get an interview through a networking contact, he adds, "an employer may interview you simply as a courtesy to the person who referred you, if that is someone they don't want to disappoint."

????Even if the job opening is phony, it's still worth going, he says: "Sometimes they discover you're a good fit for a different opening that really does exist. You never know where an interview might lead."

And the #1 myth about job interviewing: The most qualified person gets the job.

????In at least one crucial respect, a job interview is like a date: Chemistry counts.

????"A candidate who is less qualified, but has the right personality for the organization and hits it off with the interviewer, will almost always get hired over a candidate who merely looks good on paper," Couper says.

????What can you do if you suspect you're not knocking an interviewer's socks off?

????"At the end of the discussion, you'll probably be asked if you have any questions," Couper says. "If you sense the person has reservations about your style, ask what the ideal candidate for this job would be like." Then think fast. Can you talk a bit about how you fit that profile? "Addressing any concerns the interviewer might have, beyond your formal qualifications, is your chance to seal the deal," Couper says.