Seek Help
If none of the above tips help you, it's time you seek help. If your guilt seems to be turning into depression, you should go and visit a psychologist. Timely consultation can work wonders for most. Sharing of problems has always helped people but it's also important with whom you share your problems. Psychologists are used to handling cases like these, and they know exactly where the problem lies. You have to understand and accept that you have a problem, only then can you accept a solution. If you live in denial, the guilt is going to have its long term effects on you.
More than finding out how to let go of guilt, concentrate more on how to overcome it in a healthy way. If the guilt still continues to haunt you, you need a change of place that might probably be the answer to all troubles. Go on an adventurous holiday if nothing seems to help. Chances are, if you keep trying at it, you might just be successful in overcoming it. Don't Worry, Be Happy!
Read more at Buzzle: http://www.buzzle.com/articles/how-to-let-go-of-guilt.html