Introduction : what gets us off track? -- Forces from within -- Better than Mother Theresa : inaccurate views of ourselves -- The unreliable motorcycle racer : infectious emotions -- What the cracked pot couldn't see: an overly narrow focus -- Forces from our relationships -- How to draw an e on your forehead : lack of perspective taking -- The curse of the blue t-shirt : insidious social bonds -- The power of stickers : salient social comparisons -- Forces from the outside -- They're not as dumb as you think they are : irrelevant information -- Traveling to Europe on pudding : subtle changes in framing -- Cheaters in sunglasses : ambiance and opportunity -- Conclusion : sticking to the plan.