Easy, don't be scared of losing. Always keep in mind that losing is a part of winning.
You see, if you treat every failure as a learning experience, then youll end up a winner.
This is very easy to say but very difficult to put in practice, people hate to lose I have seen people very upset because they lost a friendly game, people like that are not prepared to lose a significant amount of money when they are trading and in my opinion they should never trade because they are not ready psychologically to manage the ups and downs of the market.