5D3 coming. Advice?
In all sincerity, get to know the camera a little...then spend ALL your time looking through the view finder snapping pictures as creative and eye grabbing as you can. Do not get caught up in tons of reading on forums like this one unless you are seeking a solution to a particular problem. You gotta use your eyes and your brain and inner creativity to create as many pieces of art as you can. You need the urge, the uncontrollable desire to be more creative and try things you never would have thought of before...the desire a dope fiend feels. All those amazing photographers out there, they live it. Be one.
-Best of luck with the new tool. It is only a tool. YOU are the reason a picture is GREAT.
Your favorite retoucher's favorite retoucher.