Watch your Histogram
Digital Outback Photo’s latest article is a useful guide to understanding and using the histogram on your digital camera, including color channel clipping and the “expose to the right” rule.
“In the field the main difference using a film or a digital camera is the LCD on the back of the digital camera giving you the ability to evaluate an image right after exposure. So you might think that watching your pictures on that small LCD is a main benefit going digital. Ok, if you try hard you can check sharpness by zooming into the image. The main advantage of this LCD for me is actually to check the exposure of my last photo.”