I was referred to a hearing clinic with mine and I generally don't hear it now unless I think about it.
At the hearing clinic they told me I needed to train my brain to ignore it.
He used the analogy of your feet being on the ground. Your brain is constantly sent signals from your feet that they are happily planted on the ground - bet you can feel your feet now? 😄.
Your brain registers it, thinks, all is ok, propertyhelp hasn't gone arse over tit, so I'll ignore it. And so it happens continuously without your brain telling you every nanosecond that your feet are properly connected with the floor.
Should you stumble, your brain immediately doesn't pass on the 'ignore' signal but warns you to rearrange your feet and put your hands out to try and prevent a fall.
So, every time you hear the ringing (or however your tinnitus presents) you need to get your brain to think 'that noise is ok, I don't need to make you hear it/think about it'. So just like not constantly being told your feet are correctly connected with the ground.
When I can hear it (like now as I'm talking about it!) I try to just brush off and go and distract my brain by doing something else to occupy it. As I said, now I only hear it on occasion, usually when I read the word 'tinnitus' 😂. So it can def improve.
I hate white noise or background noise so this doesn't work as a distraction for me.