Wiseman compares the myths/conjecture promoted by the self-help industry to the decades of psychological research done on areas like happiness, decision making, persuasion, motivation, creativity, and relationships. The focus is on small changes to one's life that can yield disproportionately large results (for example, writing down 3 things that you are grateful for can measurably increase happiness for a month). It's a pretty quick read, covers a wide range of subjects (so as to stay fresh), and has useful advice to give (with a Top Ten techniques at the very end).