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If you don’t drink coffee, you should think about two to four cups a day. It can make you more alert, happier, and more productive. It might even make you live longer. Coffee can also make you more likely to exercise, and it contains beneficial antioxidants and other substances associated with decreased risk of stroke (especially in women), Parkinson’s disease, and dementia. Coffee is also associated with decreased risk of abnormal heart rhythms, type 2 diabetes, and certain cancers.12, 13 Any one of those benefits of coffee would be persuasive, but cumulatively they’re a no-brainer. An hour ago I considered doing some writing for this book, but I didn’t have the necessary energy or focus to sit down and start working. I did, however, have enough energy to fix myself a cup of coffee. A few sips into it, I was happier to be working than I would have been doing whatever lazy thing was my alternative. Coffee literally makes me enjoy work. No willpower needed. Coffee also allows you to manage your energy levels so you have the most when you need it. My experience is that coffee drinkers have higher highs and lower lows, energywise, than non–coffee drinkers, but that trade-off works. I can guarantee that my best thinking goes into my job, while saving my dull-brain hours for household chores and other simple tasks. The biggest downside of coffee is that once you get addicted to caffeine, you can get a “coffee headache” if you go too long without a cup. Luckily, coffee is one of the most abundant beverages on earth, so you rarely have to worry about being without it. Coffee costs money, takes time, gives you coffee breath, and makes you pee too often. It can also make you jittery and nervous if you have too much. But if success is your dream and operating at peak mental performance is something you want, coffee is a good bet. I highly recommend it. In fact, I recommend it so strongly that I literally feel sorry for anyone who hasn’t developed the habit.
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Scott Adams (How to Fail at Almost Everything and Still Win Big: Kind of the Story of My Life)