I wanted to share something, too. This is a 37-page pdf "A Magical Society: Guide to Mapping", a preview for the book "A Magical Society: Ecology and Culture", but those 37 pages can be used as a stand alone and it is a good starting point for everyone who wants to create a world from scratch, using tectonics, mountains and wind to form climates.
Free download from E23 Steve Jackson Games, no login/account required.