Psychological preparedness sounds good but I have become very skeptical about the ability of anyone to change their psychology. There may be some option for change if you are willing to undergo intensive and protracted counseling, and possibly psychotherapy, but I've never seen anything but very superficial change when it is undertaken alone.

More than once I've seen people, almost always males, who use some combination of mental imagery and manufactured exercises to 'practice' mental toughness and resiliency. It seldom seems to work. I'm thinking about starting a thread exploring the issue.