·Organize your belongings
Refrain from habitual actions like fumbling, swallowing hard, biting nails, etc. as all these signify that you are not confident. Instead, speak clearly and in a tone that is easily audible. If you do not understand anything, be prompt and polite enough to request the interviewers to repeat what they have mentioned. The same goes in case of your dress too. Wear clean and properly ironed formal apparel that fits you perfectly well. All the factors will contribute towards making you look self-assured.