I think this is good advice. I did the same thing when I first started. Whenever I went out to take photos, I always took at least 20 shots (usually ending up with 1 or 2 that were decent) of the same thing. When my girlfriend was with me, she would always ask me why i was taking so many photos of the same thing. Basically what I was doing was experimenting with different angles, then when i got back home id look at them in PS. And then of course pick the one that I thought was the best. Now it just comes more naturally to frame shots and I usually only end up taking around 3 or 4. And usually 2, if not all of them are good angles.