Nice tip - but you can't sell many books with content like that :+
Seriously though - nothing beats time spent on the water. But if all you do is flail at the water for hours on end - all you'll get is tired and chances of getting lucky with a fish are slim. Do spend lots of time on the water, but have a strategy in mind. Then learn and adapt as you go. Otherwise all you are doing is casting - not really fishing. But then I know KerryS wasn't being completely serious with his 'tip'...
I might not have been totally serious but I was being completely honest.
I was lucky in the fact that I was taken under the wing, if you will, of a couple of very good steelhead fly fishermen when I picked up the bug rod in search of chrome. If I were to add to my tips, it would be to pester the hell out of the best steelhead fly fishermen you know and get them to take you fishing.