You probably know about the times when your approach to trading has been emotional rather than rational. You've probably read the books about the great traders, and know you should stay calm.
But knowing is one thing, doing is another.
Managing your mind to manage your money
As Noel Whittaker the great financier said: "Becoming wealthy is not a matter of how much you earn, who your parents are, or what you do... it is a matter of managing your money properly."
And to do that you need to manage your mind properly too.