Teenaged me avoided physics in school. It sounded hard, so I took geology and astronomy instead. That’s too bad because grown-up me has enjoyed learning about physics principles, especially how they apply to email marketing. Take friction, for example. When you learn about physics, you learn friction slows motion. Just as your slick socks will slide across the kitchen floor more easily than your rubber-soled shoes, friction can impede motion in email marketing too. So if […]