I purchased a relatively cheap book on recording techniques from amazon. I currently use two mics, a standard vocal sure SM57 positioned approx 12 inches from the bridge, and a condenser mic approx 24  inches away about half way down the neck. The idea is that the standard mic will pick up more of the direct sound and possibly more bass. The condenser mic will pic up the ambient, more subtle tones of the guitar. It's always best to put on headphones whilst experimenting with the positions of the microphone. Record the guitar dry [without any effects], this will give you a better quality recording. When mixing I add hall reverb, but not too much, just enough so that you can hear the reverb kick in. In the pan I normally have them at the two extreme positions.

Hope it works for you.

Denis