Hi Ed: I hope this isn't over simplistic but my tip would be "think before you shoot". In this era of auto everything it is too easy to pick up the camera with the zoom lens and matrix metering, go this looks good, trip the shutter, end of process. I know that when I take the time to study the situation, try different focal lengths, move my position slightly, etc. I usually get better results. Obviously this won't work in all situations like shooting sports though even there a little pre thought can go a long ways.
BUTCH "Each man had only one genuine vocation - to find the way to himself" Hermann Hesse (Demian)

