I don't often recommend specific methods to help with grief. But the self-help method I'm going to tell you about - EFT or Emotional Freedom Techniques - is well worth making an exception for.
Basically, it involves tapping on the acupuncture points to tap into your body's own energy and healing power. If you think that sounds a little far-fetched and woo-woo, so did I. In fact, I starting doing EFT on myself for chronic physical pain. The first time I did it I felt rather silly and thought it would never work - and it STILL worked so effectively that I actually laughed out loud!
You can read more about it here:
This simple technique has helped many thousands of people all over the world cope with issues of all kinds, including grief and bereavement, chronic pain, depression, disease and emotional problems. Perhaps it could help you too?