1 have a mentor that will always set you back on the right track when you are going off the road
2 don't start big and don't always go big trading is not a long term process
3 set rules for yourself and develop the discipline you need to abide to those rules
Well this is my my opinion atleast and I am a newbie here so I'm open for correction
Having a mentor would not just stop you from becoming a greedy trader that losses because of his greed. A mentor that has a greed problem is going to transfer that problem unknowingly to you without knowing because all his directions will be making you become hungry for more profits therefore making you to become greedy. There are some traders that are not contended with what they have gotten, they want more profits and when they go after the profits, it disappoint them because what they get in return is losses. Greed comes from lack of discipline therefore as traders we should not only be learning how to trade and the strategy that we are going to be using but we should also learn some good manners we should be having as traders as it will help us to become good traders, making money.