First of all accept it and don't look at it as if it is a disease! Thats the key point to life with it and be happy. It isn't a disease. ADHD People just think and reakt in another way than a unaffected person would. We are mostly creative, open and full of joy. So whats the problem with it? Yeah maybe we have problem to focus on boring stuff and also react a little bit harder than others would do. But it is totally ok. Maybe don't wrip somones head of whene you are angry but you should stay your ground in a calm way.
Here some tips. They helped me in some harsh moments.