This is a very important topic for everyone, not just for people diagnosed with ADD/ADHD. The principles involved affect us all - especially the fact that what we are imprinted with at birth become our baselines for life unless we deliberately go in and liberate ourselves (which very few people understand how to do).
The book I mentioned to you previously 'feelings matter' goes into great depth on this topic and provides introductions to the tools needed to heal these issues in ways that modern therapists are only now beginning to start to understand the basics of. The books I am referencing are WAY beyond the level of understanding of 99.999% of humans.
RE: Gabor Mate. Scattered minds. A book about ADD.