Well, my tinnitus hasn't improved in 20 - 30 years, but it also hasn't gotten worse. Gotta celebrate the positives. Anything that calls attention to it is counter productive, and all the old stuff is still true... stay busy, eat healthy, get plenty of exercise (but not so much that it elevates your blood pressure for extended periods), practice daily meditation, do things you enjoy, have a social life... there's a long list.
I've had my tinnitus long enough to know it goes up and it goes down. It could be up all the time, so this is OK. We've had rain for the last 4 days and nights, and today was the first time I got on my eBike for a while. On the bike the tinnitus is inaudible, the wind is in my hair, it's something I thoroughly enjoy. Going down a hill at 35+ MPH is as thrilling as when I went 135+ MPH on my motorcycles because the eBike is so much lighter and twitchier. I probably mention it too much, but it's dependable and it's always a fun thing. Even when I got soaked the first day of these rains it was a blast.
Tinnitus acceptance is just about making the most of each day and each moment. Stewing about the past or going off into the future is a colossal waste of time, and unhealthy. This may sound corny, but we forget about it. I can catch myself and go, whoa! Why am I running around in my head like this? This is all make believe, reality is right here, right now. Acceptance doesn't mean complacency, just being OK w/ the reality of tinnitus. The quacks that scam people w/ false promises are something that karma will take care of.