I'm the author of the book "The Gambit Files: Tactical Themes to Sharpen Your Play", a book that examines the traps and keys in 15 gambits, by way of 237 puzzles from the openings, rather than memorization of lines of play. It's available through MongoosePress.com. My homepage features 10,000 chess puzzles, indexed by grandmasters, past and present and highlights a dozen or more of the traps 'n zaps that you find in each of 150 different ECO's. I hope you take some time to look around. I've taught chess in middle school for ten years.