To manage emotion don't trade with money you can't afford to lose.
Stop using high leverage or lot size and manage risk.
That's not enough, whether it's extra money or not, money and emotions can be taken care of with proper risk management and execution.
Not only stop using the leverage form for a long time I used to endorse in my posts that the newbies should completely avoid leverage trading because it seems attractive in profits but in reality, it's not. A newbie can easily get trapped by the market even while moving sideways in leverage trading. Better learn and experience the Sopt market. It's not less rewarding if you're a disciplined person.