I'm by no means an expert, but people seem to like what I've been doing with B&W lately, so I thought I'd share the method.
It is incredibly simple, I just adjust levels to get the highlights and shadows set, convert to greyscale, and then apply an s-curve. Usually as an adjustment layer so if I'm unhappy with a print I can open the PSD file and make adjustments down the line.
This is the curve I used for the "hands" image.
And this is an example of the effect.