Book excerpt: Summary of 13 Things Mentally Strong People Don't Do - Everyone is aware that consistent physical activity and weight training produce physical strength. However, how do we prepare our minds for adversity? And what should we do in response to these difficulties? Or what should we stay away from when faced with difficulty? Our inability to change bad habits is frequently what prevents us from achieving true success and pleasure. We are held back by self-pity, fretting about things that are out of our control, dwelling on the past, resenting other people's accomplishments, and expecting quick fixes. Disclaimer: This is a summary of the book, not the original book, and contains opinions about the book. It is not affiliated in any way with the original author.