“Today, people tell you, "Don't worry." That's usually friendly advice – and also unhelpful. It's better to tell people, "Worry productively." If you're going to spend time thinking about bad things that might happen, then use that energy for a purpose. Go ahead and visualize the worst that can happen. But instead of wallowing in your worries, imagine how you'll respond to them. Practice. Mentally rehearse what you'll do. Imagine and envision yourself making it through hardship. Your mind is built to prepare for problems. That's more than OK – it's good. The goal of mental rehearsal isn't to fill your head with happy thoughts about the future, but to prepare yourself to succeed in the real world.”