That's one way to go about it.

It works for picking fruit and vegetables at the grocery store.

But even for that, you need to be at the grocery store first. You can't stand on the street and think you'll know the right fruit when you see it. You may never see a piece of fruit that way.

The better way is to first invest the time to understand what it is that you want, and then figure out where you need to be in order to go, "I'll know it when I see it".