For years, whenever I've encountered a word for a fascinating concept that my computer's built-in dictionary didn't recognize, I've added it to a collection I keep of "Fascinating Obscure Concepts." Here's the first part of my list of these unusual concepts you may never have encountered before: —LITTLE-KNOWN SELF-IMPROVEMENT CONCEPTS 1) Musterbating: Albert Ellis' term for rigid, self-imposed ideas that many people hold that "I/you/they absolutely must (or should) do X." Rather than seei...