What About the Big Stuff? Finding Strength and Moving Forward When the Stakes Are High by Richard Carlson (2002)
The only really new/unique ideas I remember coming across in self-help books are those in Neuro-Linguistic Programming, specifically the techniques of recognizing the imagined physical properties of ideas/memories (where you "see" them, how crisp the pictures are, how loud the sound) and adjusting them for desired effects (for example, make a scary idea less real by projecting it on a screen, then shrinking the picture and lowering the volume, etc.) But trying out those techniques never had much effect in my actual life. Flylady, and to a lesser extent Judith Morgenstern's Organizing from the Inside Out, are the only self-help methods that have really made a difference to my day-to-day life.