My blanket policy for this flies in the face of perhaps all other conventional advice, but wherever I interview, I wear the most conservative bit of clothing I'

My blanket policy for this flies in the face of perhaps all other conventional advice, but wherever I interview, I wear the most conservative bit of clothing I'm willing to wear every day for that job. I used to wear suits every day (and still do on occasion), so I'd invariably wear a suit to an interview. Once I outgrew the notion of wearing suits, I quit wearing them. It sets the tone for what they can expect of me in the future, and doesn't give any false impressions. I'd rather they hire 'me' than some notion of how appropriately I ticked their boxes. I remember interviewing for a fairly conservative defense contractor, and the interviewer commented on it -- saying something like "So, I noticed you're not wearing a tie," to which my response was "Yeah -- I didn't want to give you the impression that I was willing to ever wear a tie." I got that job, and never wore a tie when I worked there (though I did 'dress up' in a casual suit where appropriate.) The point, in a roundabout sense, is that if you aren't comfortable wearing a tie to work every day, don't wear one for the interview. I'm sure this changes if you really need this job, or are willing to do anything to work for this particular company or something, but it's a decent piece of general advice.