Since my worsening it's taken a long time to reorganise my mindset.
I think accepting that this condition is not going to go away is the first major hurdle to get over, particularly for people like you and me who were habituated to tinnitus for many years.
I keep a journal. Actually it's just a very simple one with only a single word written against each day of the calendar month describing the previous day. At times I've used the word, Brutal. At other times the word, OK.
One month things might be 50% brutal. Or it might be 75% OK. It all depends. Tinnitus does what it will. The main thing for me is that if it's 50% brutal that means the other 50% was OK.
I've worked really hard to try and identify the kind of stuff that I might be doing when tinnitus ceases to be an issue. In fact to such a degree that it's non-existent. For me it's building work. Manual labour. Whether that's for other people or at home around my own house or garden, digging at stuff transports my mind into another dimension where I can completely forget about tinnitus and even hyperacusis. Building work (and growing some fruit and veg) means I can also create suff that me and the missus can enjoy, so that's an added bonus.
On the really good days/periods I've ceased to think that I'm cured. In fact I now make a point of reminding myself that there are still going to be brutal days ahead. Tinnitus is likely going to be a lifelong condition and it, not me, will decide when it's going to flare up and make itself known, or when it's going to remain calm. In a way, by keeping a very tight sense of control over my own perspective on this I think I've been able to let go easier and slowly surrender to my condition bit by bit. It's a strange process to be honest.
Stuff like this is how I've crawled my way through these past few years. Literally day by day. I don't think there are any Kumbaya moments with severe tinnitus. It's an extraordinarily difficult malady to live with. But if this experience has taught me anything it's how resilient I am. And I'm nothing special. My resilience and instinct for survival are exactly the same as yours.