Your body language speaks louder than your words or tone when talking to others. And so, Carnegie says one should hone their body language to appear more charismatic. Stand tall (shoulders back, no slouch), uncross arms (welcoming), lean slightly in (engaged), hold steady eye contact (trust, not stare-downs). Mirror subtly (they cross legs, you do post-pause). No fidgeting. Remember, a tense body language repels others; while an open body language invites people.