One of his best rules, arguably his No. 1 for success, may move you farther and faster in life than ever before. But I warn you: It will take some internal work. Because it comes from deep down–from within us all. It’s a rule founded on a very squishy four-letter word that the business world often turns a blind eye to: Love.

Warren Buffett on Monday said he'd seen many families "driven apart" by wills and inheritances over the years. Here's what he thinks you should do to avoid that.