These days everyone wants you to hack your life in order to make your day-to-day existence more efficient. But there are times when the effort's not really worth it—and this chart should help you work out what to spend time on, and what to ignore.
28-year-old Neil Harbisson has achromatopsia, which means he only sees in black and white. You'll notice in his photo however, that he's wearing a camera mounted to his head. This converts colors into soundwaves—making him "hear" colors.