Ok so I'm shooting in a RAW format, and have GIMP downloaded already. I got pretty much the basics of using a DSLR and I understand Aperature, ISO, Shutter Speed, etc etc. Although... beyond those exposure settings, glass, and lighting... what else can I learn? I know its prob a dumb question, but after understanding the BASIC exposure settings where should I step from there? (other than post processing, I mean what other in camera stuff can I learn?) Also, can someone point me in the direction of some introductory post processing info?