Steve Jobs once told Tim Cook, "Just do what's right." Cook said he gave John Ternus advice on how to spend his time wisely. Getty Images Tim Cook has said that Steve Jobs told him never to ask what he would do but "just do what's right." Cook now leaves a piece of advice for John Ternus, the incoming CEO of Apple. "One of the most important decisions he’ll make is where to spend his time," Cook said. Steve Jobs once left salient advice for Tim Cook as the Apple cofounder prepared to hand over the reins 15 years ago. Now, the outgoing CEO has some wisdom to impart to his new successor, John Ternus . "What I've told him is that one of the most important decisions he’ll make is where to spend his time, and I would spend it where the greatest benefit to the company and the users are," Cook said during Apple's second-quarter earnings call on Thursday. "And never forget the North Star for the company. We're about making the best products in the world that really enrich other people's lives," Cook added.…