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While it was weighted towards HR principles, and I personally steer well clear of sounding like some sort of door to door salesman. I do have to sell myself. There can't be any hard and fast rules.
Interview techniques guaranteed to get you this or that, usually have a price tag after them and should have a scam warning. As an applicant though a few pointers are always welcome. Something I've noticed is the are far fewer experienced interviewers than interviewees, so maybe they've all downloaded these tips.