Just wait for a‑twentieth of a second! A study in Psychological Science found that’s about how long it takes after a craving first strikes for your brain to decide whether you’re making a healthy choice or not. And that minuscule amount of time allows you to weigh the pros and cons of taking that first bite of chocolate cake, for example, and helps overcome your natural impulse to eat it immediately. Your first thought is about taste – the second thought is about health. So just give yourself another split second before you reach for your fork, and you may be able to resist temptation.