I saw this book recommended on another thread and bought it on kindle. I have read up to the bit that says keep a log of the problems that needs solving. So I am going to start doing that tomorrow.
I'm really hoping that this book is going to help my relationship with my DS (5). Like the book describes, he is inflexible and gets easily frustrated. A lot of this stems from anxiety, which is made worse by hunger and in all honesty, by my reaction. 
Anyway, how was your experience of using the methods? Did you find it difficult? And how long did it take to see results?