Psychological training of the trader

As far as you know, trading is a very nervous job, so I want to describe a couple of working methods so that I can effectively increase the psychological stability of the trader.
Often, the trader inserts his own sticks into the wheels.
Trading is an emotional robot and in order to achieve heights in trading, you have to work hard on yourself. You need to decide what you need for productive trading. And only then combine this into a single trading system. You need to develop the habit of focusing on exactly what makes you successful.