[header] How to stay calm in an argument [title] Be mindful of your body language. [step] Your opponent may get the wrong impression of you if you exhibit aggressive body language. You could come off as mad or even snobby if you aren't mindful of what you are doing. 
[substeps] Crossing your arms, pursing your lips, and slouching could give you an angry appearance, even if you aren't. Instead, stand straight up, place your arms in a neutral position, and keep your face relaxed.