As often as possible. Take that with a grain of salt of course. I’m not encouraging students to go out and fail all of their classes, or successful business people to run their companies into the ground. I am simply stating that you will learn more from failing than you ever will from success. Unless you choose to sulk and pout about failure, then you are probably not emotionally mature enough to learn from it.
What failure is NOT: a personal label, a badge of disgrace, a way of life.
What failure IS: an opportunity to learn, a time for growth, a motivation to do it better the next time.
I’m not going to lie. It sucks! But you’ve got to suck it up and get back in the game. So go out and fail. Do it often. As the Navy Seals say, fail forward fast. When you are failing your doing. And doing is a heck of a lot better than sitting around waiting, or planning, or just flat out doing nothing.
Quit fearing failure and start learning from it.