For years, I thought mug warmers were unnecessary. If my coffee got cold, I simply reheated it. Problem solved. At least, that’s what I believed. Then I started paying attention to how often it happened. Every morning, I’d make coffee, sit down to work, answer a few emails, join a meeting, and suddenly my coffee … Continue reading I Thought a Mug Warmer Was a Waste of Money—Until I Realized What It Was Really Costing Me