Need a few bright ideas for your store? We ­collected the top takeaways from the best speeches and seminars at JCK.This year, there were 70-plus educational sessions at JCK Las Vegas. Even if you’d spent all day every day ­hopping from speech to seminar, you’d have packed in only about 20. But we know you like to walk the show floor—plus eat lunch, chat with your fellow showgoers, and have a drink or two. That’s why we’re here. We hit more than a few ­sessions and selected some choice tidbits from some of our faves. See you in 2015! The Topic20 Store Events Worth StealingCathy Calhoun, owner, Calhoun Jewelers, Royersford, Pa.The TakeawaysTrunk shows? Not for Cathy Calhoun. Try brownies, concerts, and film fests.• Calhoun’s events usually include a charitable angle, but always transcend the ho-hum trunk show model (which she feels has lost its luster). “Think about