If I could only teach you one thing in this photography basics series, it would be to set your camera in aperture priority for the next six months. When you want full depth-of-field, choose a high f-stop (aperture). When you want shallow depth of field,
A nice little tutorial for hobby photographers like me who don't necessarily have the time to take classes but would love to learn the basics of good picture taking. Plus a link to a photoshop tutorial.