But I should caution that if you seek to plot out all your moves before you make them—if you put your faith in slow, deliberative planning in the hopes it will spare you failure down the line—well, you’re deluding yourself. For one thing, it’s easier to plan derivative work—things that copy or repeat something already out there. So if your primary goal is to have a fully worked out, set-in-stone plan, you are only upping your chances of being unoriginal.
It isn't enough to pick a path—you must go down it. By doing so, you see things you couldn't possibly see when you started out; you may not like what you see, some of it may be confusing, but at least you will have, as we like to say, "explored the neighborhood." The key point here is that even if you decide you're in the wrong place, there is still time to head toward the right place.
From a very early age, the message is drilled into our heads: Failure is bad; failure means you didn’t study or prepare; failure means you slacked off or—worse!—aren’t smart enough to begin with. Thus, failure is something to be ashamed of.