My own experience with grief is the 5 stages are not experienced in order, but are experienced uniquely each day. One day may be denial and another acceptance or anger. It is different with each person.

The way I coped with grief was to reinvent who I identified with and what I could do at this moment to feel better.

It is almost like I had to find stepping stones to get me across the stream of grief. Exercises, yoga, tai chi, mindfulness all helped. to me grief does not end, but I stop focussing my attention on it and instead focus on what I can experience, the present moment. Of course that sounds simple, but for me it took years and is still not complete, although the sadness comes out less frequently.
@CANDC