settting for best result is different in different situations and different for different people.
shoot as much as you can, and try to remember the environment and light condition (light from which directions, white balance, reflective substance if any, flash uses with compensation and distance, etc) of each picture taken. go back home check the picture with shutter speed, aperture and other settings against your memory.
that's how i play with it!~
btw, i am not a canon user, hehe... :bsmilie: