Tony Sweet
Quote from an interview with nature photographer Tony Sweet:
Tony [Sweet] tells his workshop students that they’ll know they’re getting better by the number of frames they’re shooting—and the number they’re keeping. “The better you are, the fewer frames you shoot,” he says. “When you come back from a vacation or a field trip with five thousand pictures, you’re not a photographer, you’re an editor. The better you get, the fewer pictures you come home with. Fewer frames, more keepers—that’s photography.”
More about and from Tony Sweet can be heard in the first Nikonians Podcast, which I highly recommend.