I spent years learning to ignore the "wisdom" handed down to me 50 years ago. Eventually, I learned to sharpen free-hand, and eventually I found Japanese water stones. I agree with Batosai that you eventually learn the sound and feel of correct sharpening. You also learn that some knife steels give better feel when sharpening that way. The big thing in free-hand sharpening is to learn how to maintain a constant angle.
However, these days I save a lot of time by using a jig to keep the angle constant. When I've got a blade that's only a little less sharp than I like, I usually grab my Spyderco Sharpmaker. But if I've got a knife that needs to be rebeveled, I always use my Edge Pro. The Edge Pro is a terrific invention, and Ben's support of his product is unexcelled.
IdahoBackwoods