An easy two-week lifestyle plan for boosting your brain

At 26, tech guru Dave Asprey was a multi-millionaire, yet he struggled with mood swings and poor memory. Applying his computing skills to his brain, he created Bulletproof coffee (with butter and oil), which helped him focus. Asprey, now 45, runs a neuroscience institute and has devised a two-week plan called Head Strong to improve mental agility. Here, he reveals how small lifestyle, diet and exercise tweaks can help us all develop a sharper brain. Too much stress, lack of sleep and exercise, poor diet, and other forms of brain kryptonite affect our thinking power, leaving us tired, irritable, unfocused, and craving sugar.