Yesterday morning, my five-year-old son made his first two-dollar sale and dropped sixteen lessons on selling and life that are more practical than any of the slop you’ll find on LinkedIn, and even kind of prepared. I’ll share them with you, but first, I need to tell you about Dev, about his Donut Hats, and about his world. One day when Dev was three, he told me that he wanted to build worlds. Real ones. Big ones. Planets. Like, actual, physical planets. “Then you’re going to have to study…