It is not for nothing that an old Russian proverb says: "They are greeted by their clothes, escorted by their minds." In order not to get burned and not to regret, you need to remember about it and present yourself correctly, so that later you would not be ashamed.
There is no secret in the art of self-presentation (that is, the ability to present oneself). You just need to develop your positive qualities and smooth out the shortcomings. First of all, you need to start by raising your self-esteem. Without it, it will be quite difficult to behave with due confidence and present yourself from the best side. If self-esteem is initially low, then every day you should find small victories that you have won and praise yourself for them. If you do this in front of a mirror and even with a smile, the effect will only increase.
When presenting yourself, the main rule that will allow you not to burn yourself later is not to pretend to be someone who you are not. Sooner or later, other people will figure it out anyway, and you will have to deal with the consequences.
The gait plays an important role in the pitch. Agree, a person who proudly raised his head with the correct posture exudes an order of magnitude more confidence than a stooped and stiffly moving person. If you are a man, then the best option would be a moderately fast, confident gait with a clear gait, if a woman is graceful and smooth. A confident person should have a confident look. During a conversation, it is worth looking directly at the interlocutor, while not drilling him with your eyes throughout the entire conversation. It is worth highlighting the small and large "triangles": eyes and chin, eyes and the area just below the neck. It is better to alternate the directions of gaze: first to one "triangle", then to another, then 5 seconds to the side, then on a new one. If you are a man, and your interlocutor is a woman with whom you are not in a close relationship or friendship, you should not hold your gaze on the neckline for more than a few seconds.
In some cultures (for example, the Far Eastern countries), on the contrary, it is not worth looking into the eyes of the interlocutor - this can be regarded as aggression. This should be taken into account when dealing with foreigners.
Gestures matter too. Being shackled is not a good idea. But gesticulating like a windmill is clearly not worth it. No need to put your hands in your pockets (except when you are in the cold), as well as look at your watch. Gentle, moderate gestures with your hands in the direction of the interlocutor will let him know that you know the topic you are talking about. Wardrobe matters too. If you need to present yourself correctly at a business meeting, you need to pay special attention to this. Restraint, neatness, the absence of unsuitable t-shirts sticking out from under the outerwear. If you are a woman, you should not be vulgar (there may be exceptions if you want to specifically impress a man). But the main rule sounds simple and clear: be yourself. With endless attempts to adapt first to one environment, then to another, for a short time and lose yourself. You should not follow someone else's opinion, it is better to have your own. You should not trade your personality for patterns that are imposed on you. Just work on yourself without changing yourself.
