Book excerpt: Are you an achievement addict? It's hard not to be one given our collective obsession with success.Students fear that the ATAR will sum up not just their schooling career, but also their individual worth. Australians aren't just mad for sporting victory - skyrocketing house prices show we're equally hooked on owning property. Then there are the furious work habits of Silicon Valley CEOs, violin prodigies, and tiger mums.Why do we constantly strive for our significance - and could you quit the habit if you tried?