This Worldbuilding by Map post is from the worldbuilding genius that is fantasticmaps.com
Be sure to check the tutorials page. Some of you may know this, and some of this you may not know - you only think you do. Trust me, I've been a worldbuilder for several years now. I have taken university courses simply because I knew that they would teach me better worldbuilding bits and goodies. And I learn something from Jonathan every time I check his site!
Fair warning: You will get lost in the Maps section. There, my conscience is clear.
And perhaps the best part....these FREE maps! (make sure you read the Creative Commons link)