Is this GTD the type of system which might help, or am I fruitlessly searching for a non-existent miracle cure?
Just a warning, though: miracle cures are really non-existent. You may see a rise in the feeling of being in control for the first few weeks, and then it may wane down. Depending upon your situation, acquiring GTD habits (or any other serious habits, for that matter) may take six months to two years. Has been so for many people here; at least true for me. Of course it's not that you don't start getting the benefits before the end of two years; it's improvement all along. (I am in fact rephrasing lines from one of the DA podcasts.) Keep working on it, and stay tuned