Just a little heads up about a few very good sources.
First for a little reading, anyone who even thinking about making or organising a sound library should read these articles. I read them and actually saved them as they are so useful! Written by the excellent field recordist and blogger/writer Paul Virostek:
My second weekend suggestion is the latest Tonebenders podcast with Michael Raphael being the guest. You can learn about MS, dual-MS, XY and ORTF techniques, listen to examples and hear some opinions about the usage of those. Really valuable information not only if you’re plan to record in these formats, but even some very good tips and opinions about using the recordings in surround, stereo and mono.