Grief - how do I work through it?

A topic for discussion came up recently with other Nons and that is the level of grief work that you/us should do - actually BOTH parties probably need to do - but how do I actually DO it? Like, how do I sit in it? Do I allow myself to cry? Do I try to cry in the evenings when I have time? (Although now that I've typed out that sentence it makes me smile/laugh because I can't really 'DO' grief, it just has to happen) 

But seriously, what does grief work look like? What has it looked like? I'm wondering if I'm blocking myself from actually doing it (subconsicously) or allowing myself to grieve. I'm finding it really difficult. 

And it feels like this forum should have a grief section because there's so many type of it that we are all experience PLUS the grief that happens before/during/after a diagnosis and for what our marriages were/have become/what they weren't.