Here's what I learned listening to a talk by David Freidberg, part of Stanford's brilliant Entrepreneurial Thought Leaders series.
"When you say 'I got lucky.' you got lucky because you didn't know what was going to happen. So the corollary is if you know what's going to happen, there's no risk, there's no luck, and there's no uncertainty in whatever it is you're doing. Therefore, shouldn't your objective to be to know what is going to happen? Your pursuit should always be to remove the unknown from the equation."
Of course, he points out there you can never know everything, and any pursuit carries some risk. That means your job is to "identify the unknown, mitigate the unknown, and then you are enabling certain outcomes."