Several components:

• Diet (stay properly hydrated, have enough protein, not too much sugar), especially if you're on ADHD medication

• Find something you're passionate about and make that your world, then all "distractions" will become useful and powerful tangents

• Meditate. This will help you stay focused and change focus in the long run, along with countless other benefits that aren't immediately relevant to your question.

Also, I'm suspecting that the medical industry completely misunderstands and misclassifies ADHD.

If I absolutely had to bet my life on it, I would say that people with ADHD just use a different approach to problem solving than "neurotypical" people and that's it.

It just so happens that the entire society is set up and run by people running schedules and making up stupid rules, e.g. "neurotypicals".

So obviously the non-neurotypicals will look "weird" in contrast. Ironically, normies tend to be the most dense, regardless of their field.