If you want good decisions to become default
decisions (to exercise, eat better, enlighten yourself, anything), consider "sunk costs"—money spent that you can't get back, advises the Harvard philosopher Robert Nozick in his book The Nature of Rationality
. For instance, buy a use-it-or-lose-it yoga class pack, prepaid weekly deliveries of organic veggies or—Nozick's example—season opera tickets. Your aversion to losing money helps you follow through on your best self's intentions—even on lazy, down days when you'd normally choose otherwise.
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