I think the most important thing to become a trader is to control your emotions. Many new traders often let their emotions overwhelm and they often make the wrong decisions. If you have negative thoughts while trading, it is best to stop and resolve those emotions before returning to your trade.
But when you are in real trading controlling your emotion is so hard to do there will always time that greed will control your emotion but if you manage to control your emotion, I'm sure your trading flow will change because your risk management will be more flexible to make a good decision.