Contrary to popular belief, the most powerful magic words are not “abracadabra” or “alakazam.” No, the most powerful magic words are “fifty percent off.” I found my favorite foaming co-wash slashed to half price at Ulta last weekend. Unfortunately, as I celebrated with a well-placed booty pop, I realized — OH, NO! — that they were on the same shelf where they keep the soon-to-be discontinued products. As you know, I’ve been trying to embrace the Marie Kondo life, so…