21 Settings, Techniques and Rules All New Camera Owners Should Know is a great place to start. Even if you are an experienced photographer, there are tips here worth reviewing. Included are Aperture and Shutter Priority Mode, Introduction to White Balance, Automatic Exposure Bracketing, How to Take Sharp Digital Images, How to Get Shallow Depth of Field in Your Digital Photos, Understanding Exposure, The Rule of Thirds, and many others. If you think "histograms are scary," this article is for you -- it will demystify your camera and help you create much better images.
Image: Kris Krüg, kim cathers, 2007. Available from Flickr under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic License.