I took about 110 shots in a week's cycling holiday in the Outer Hebrides, on a film camera with one 24mm and one 50mm lens. I still found that too many shots and wished I'd been a bit more disciplined with duplicated shots of the same scene.
Of course, if you're taking photographs for potential commercial use, the drivers are quite different; but I just can't make use of 900 shots in one area even if it is very photogenic. So I adopt the mantra "edit before you shoot, not after" which funnily enough sounds like the kind of advice Roger might give.
I accept also that the drivers are different if you're shooting wildlife or sports and the ability of a digital camera to take 8 shots per second is really useful. But landscapes don't move much so a landscape photographer can afford to slow down and take fewer shots.
By the way I recently used Roger's guidance on his web site to start developing B&W; I think it's going fairly well so thanks to Roger.