Noko LTD/Getty This post originally appeared in the BI Today newsletter. You can sign up for Business Insider's daily newsletter here. It's negotiation season "Omg, this is the best session." It was my childhood friend, texting me while she sat in a session during Goldman Sachs' small-business program for entrepreneurs. After quickly asking who, what, when, and where, she told me she had just taken copious notes from instructor Mori Taheripour, a negotiation expert who's also an award-winning