Ugh, I hate that stupid Pop-Sci flavored "advice" too. Way too often it comes across as if the person giving it has absolutely no idea what ADHD is about and just spits something out that sounds about right to them.
As for resources, Dr Russell Barkley is pretty much the only source I respect. Especially this video: https://youtu.be/_tpB-B8BXk0
A point in there that I actually found really insightful is that when you have ADHD, you don't just struggle with delayed gratification but also with delayed punishment. So situations like you fucking up with time management and your friends just silently don't invite you somewhere a couple weeks later won't have any learning effect. So taking more accountability than normal and asking to be corrected right away might actually be the better path