A great walk-through using Photoshop Elements 7 on how to get the colors to POP in your photographs.

A quick tutorial on how to add a blue/gradient sky to your photographs.

Learn how to correct white balance in Lightroom 2.

Learn to apply duotones to your images using Photoshop CS2.

An extension of the tutorial Basic B/W - The Next Step, which teaches you how to achieve great black & white photos using the channel mixer.

If you want to convert a color photograph to black & white, this is the best method out there.