As far as I can tell, ADHD exists on a spectrum. And treatment is also multi-faceted. Meaning you might want to take your ADHD meds and do whatever exercises your shrink suggests, and in addition see whatever self-help essays work for you, etc.
The medication often works great, if you can get it to work for you.
For some people that's less of an option. Eg the appetite suppression that comes with stimulants might be a welcome side-effect in adults, but it's usually a big no no in children.