http://www.investopedia.com/articles/financial-theory/12/psychological-coping-strategies.aspIt is also better to manage the process psychologically than to try and win back the losses through other extremely risky investments.
One meaningful way of coping is simply to learn from one's errors and try to recoup the losses over time by investing well and prudently in the future. This is no quick fix or a sure thing, but it certainly makes sense to try. If you took excessive risks or trusted the wrong people or were just plain unlucky, you can be more careful and diversify your portfolio more in the future. Even if it takes years, you may well find that you do get some, or all, of it back, and it's comforting to think that this might happen.
Intellectualization is also not a bad option. Just being philosophical (sensibly and realistically) can work wonders. Some investments simply do go wrong; there are incompetent, unethical and dishonest people out there in the industry and anyone can be a victim. This is life and what doesn't kill you can make you stronger. There is a lot of truth in such thinking and it can help.
Suppression is an essentially negative strategy. Trying never to think about the losses is difficult and can be dangerous. Those thoughts can come back and haunt you anytime and may come out in other ways. Also, suppression creates a complicated inner conflict, which is not good for you or those you deal with.
Rationalization is useful, but only if it is realistic. It is important to understand what you and others did and why. For instance, were you tempted by the lure of big money, or were you the victim of a mis-selling? Were false promises made? Knowing what really happened in the past is the best way to move on to a better future. But when rationalization is really self-delusion and entails blaming others for your own mistakes, or not facing reality, the process is negative.
The Bottom Line
Almost all of us would love to turn the clock back and eradicate financial mistakes and disasters from our lives. While changing the past is impossible, one can change how one views it and reacts to it. This may enable you recoup the actual financial losses, or at least recoup your peace of mind. There are both sound and unsound coping strategies, however. Make sure that you use the good ones that will help you and not harm other people.