i.e. the 40-30-30 rule:
On a ride up the ski lift, my coach told me I was missing the point. He explained that success in ski racing, or most sports for that matter, was only 40% physical training. The other 60% was mental. And of that, the first 30% was technical skill and experience. The second 30% was the willingness to take risks.
I’ve never heard of it before, but it makes sense, and can be applied anywhere. Read the full article, but the take away is to embrace risk and go for it, push yourself beyond your comfort zone.