As the last of your New Year's resolutions unravels in front of your eyes, you probably feel like a moral pygmy. But before you sink into a heap of self-loathing, consider this. After decades of research, psychologists now reckon two traits are most likely to make us successful. The first is intelligence, with smart people doing better at all jobs. Unluckily, there is little evidence that you can make lasting improvements to intelligence. The other trait is self-control, the ability to change thoughts, emotions, actions and level of performance on duties and tasks. Of course, goals, moral rules, laws, social expectations, personal commitments and other forces play a role, but the more you can change yourself, the more successful you tend to be.
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