Petteri Sulonen provides a careful, step-by-step guide, with several examples along the way, for making high-quality black and white images from digital color photographs.
Digital Black and White
Black and white was what first got me “seriously” into photography. While I never attained real mastery in black and white printing, I have spent a long time in various darkrooms. I still enjoy the aesthetic of black and white a great deal, and of course have tried to get the “look” I like in digital as well. Thanks to a lot of experimentation, some reading up, and tips from people who are a lot better at it than I am, I’m finally starting to see the kinds of results I wanted. In particular, thanks to Jim Fuglestad, aka Shutter at DPReview, who thought up the “dodge and soft light” technique described in this essay.