I just told myself that it's free money and that I'll have better chances next time an opportunity like that presents itself.
Even you will be assuming like there are many other opportunities will be available in the future, I guess everyone will be feeling out the pain of losing even that is a free money. That is human nature and when you're feeling like that then there are good chances for you not to commit same mistake again and again.
Futures and leverage trading doesn't take time for things to get sour especially if you're wrong.
Leverage trading is seeming too cruel one because when we are losing the pain will be felt in multiple times because leveraged trading is all about in our understanding as easy money because for our same capital we get more exposure. When we are calculating about profits in leveraged trading, if we calculate about losses if we lose then we can avoid such frustration.
It is also a way that could help us to change our strategy, to set our mindset, and particularly is to enhance our decision-making.
I am sure trading is always give you chances to realize the root-cause of mistakes and chances to change our strategy and to tune up our mindset/decision-making capabilities. But, people who now will learn from their own experience will simply move on without learning anything. I guess most people are simply moving and this and it is the reason they are committing mistakes again and again.