I made a conscious decision not to tell anyone in my life. Now I tell people - don't tell anyone your idea until you have invested enough of yourself in it that you are not going to turn back. When a person has an idea at that conception moment it is the most vulnerable - one negative comment could knock you off course.
I think failure is nothing more than life's way of nudging you that you are off course. My attitude to failure is not attached to outcome, but in not trying. It is liberating. Most people attach failure to something not working out or how people perceive you. This way, it is about answering to yourself.
Don't solicit feedback on your product, idea or your business just for validation purposes. You want to tell the people who can help move your idea forward, but if you're just looking to your friend, co-worker, husband or wife for validation, be careful. It can stop a lot of multimillion-dollar ideas in their tracks in the beginning.