For the money or for art?
2 ways to look at it. One is to get the money shots which customers are willing to pay for. Second is to get the shot you want to make talk to ppl in the level you want.
Depends on the purpose of the capture:
for documentation, memories, appreciation of beauty, ideas, expressions, etc.?
Good photography is something you're able to post it in P&P without getting slammed left, right and center.
when people praise/paid u for the crappy piece of work.
how about this : something that cause you to go back and see it for a second, third time.. the wow factor that bring eyes back to it.
I Like and smile....goes to my Computer background picture...!