The first thing that catches our eye when we look at successful actors and businessmen is their posture. Indeed, non-verbal communication will tell your interlocutor much more than you can imagine. Take a close look at the postures of presidents and entrepreneurs. They often use gestures of authority. In doing so, they appear completely relaxed. In reality, it may not be like that at all, but nothing will give away their anxiety.
A great practice is to pick a celebrity you like and practise in front of a mirror how they move and speak. Focus on how you feel and see yourself. Chances are, visually, your height will be taller. It also does not hurt to update your wardrobe: in old things feel cosy, but a new bright dress and shoes oblige you to keep your posture. Remember, all the films and TV shows in which the heroine transformed, this is how the principle of dress for success works.
Blaming failure on your boss, the government, bad weather, a stranger on the bus or your partner is much easier than admitting defeat. Contrary to perception, successful people are not those who never make mistakes, but those who draw conclusions and move on. The main thing is to look at yourself not from below, as a passive creature, obedient to the will of fate, but a person who creates and changes reality for himself.
Yes, objectively there are things that do not depend on our will. For example, wars or natural disasters, but this does not mean that one should give up. Even in unfavourable conditions you can find opportunities. To be effective, we need to limit ourselves in time: not to be sad and passively indulge in dreams, but to act and make progress. The latter in any case is converted into experience, making closer to the goal.