Grief can be so personal. For me, things that helped were:
Reading. Getting lost in a really good book helped switch off that part of my mind that wanted to ruminate.
Exercise. I know sometimes it's the last thing you feel like doing, especially of an evening, but I got an exercise bike and just had at it for 20 minutes whenever the pain reared its head. Really helped. Outside of that, I stuck religiously to my usual exercise regime.
Day time I would garden a lot. Evenings I'd focus on researching or planning things for the garden.
I'm an author so I'd write a lot, but you don't need to be a professional to do this. Journals, little short stories, anything like that can be good for your mind.
Music. This can go one of two ways really, because sometimes music would upset me and other times uplift me.
Cooking. Choosing gorgeous dinners with loads of ingredients that you really have to focus on.
I collect fancy tea and tea sets, and made evening tea a routine.
Baths, skin care, hair care, nice candles lit. Find a non alcoholic drink you like. I can really recommend "Clean"; it's a gin replacement and the one in the green bottle mixes beautifully with Fever-Tree Spanish Clementine tonic water. Feels really nice to drink while you're relaxing. As others have said, alcohol is a slippery slope and it will only ever make you feel worse, it's a depressant. I think many of us have got smashed when we've been feeling low, and all it ever does is increase the misery and pile on anxiety.
And, of course, talking to friends. You don't even need to talk to them about the bad stuff - just chat with them about anything.