Well basically with two mics you have the following options:
Coincident pair: Two mics with their diaphrams placed as close to each other as possible.
Near-coincident pair: Two mics placed 7 inches apart, to represent the space between human ears.
Spaced Pair: Two mics spaced apart, using a 3:1 ratio from their source.
Then you can work with your polar patterns to create special micing techniques like bluemline and soo on, but I'm lazy so I'll leave that for you to search about.
(It's 4am, sorry if this post made no sense.)