The Making Of Maps

I've started playing roleplaying games with my two children and to this end I've started drawing fantasy maps. I've found the following guides by Jonathan Roberts very helpful.

Here is a general guide on drawing a map in Photoshop. The author provides a series of steps that will help to create a fantasy map of all scales. 

In this article the author expands on a simple design technique for creating world maps prior to illustration.

As a bonus, here's a Wired slideshow of the sketches Tolkien used to develop his stories.