I've had my Nikon D40 for several weeks now and have shot a lot of pictures with it, just to try and familiarize myself with the camera, its features, and how different settings affect the final result. However, I don't feel like I've gotten all that far. I still wind up fiddling for awhile and messing with metering, white balance, exposure compensation, etc. I generally shoot in 'P' mode (Programmed Auto, where I set a minimum shutter speed [1/30s] and the camera chooses ISO and aperture), but I've also tried Aperture Priority and Shutter Priority while experimenting. I know this is kind of a nebulous question, but does anyone have any advice on what I can do to get better at picking the right settings (or closer to the right settings, so maybe I take two pictures instead of five before I get what I want)? Is this just something I'll have to learn by taking thousands of shots and developing an instinct for it over time, or is there some particularly good resource I can take advantage of to help out? Particularly the aperture setting, I'm having a hard time getting my head around that.