How do you use it properly. Right now I use the creative modes and set the aperture I want based on the little I know (wide open ='s blurred background vs. closed ap ='s sharper picture). I use the AV mode and the M mode the most. I then adjust the shutter speed to get it in the middle of the balance on the LCD and viewfinder. Am I doing this right? Is there anything else to it. I feel dumb asking this. Of course I'm focusing on my subject with the button pressed halfway down. Is there a web site for approx. aperture settings for various situations?