When I use this style, I like a crisp coastline. There's an easy 'find all edges' in PhotoPlus, BUT recent versions do a "nice" aliased boundary. I don't think I want that, here -- so I usually drop back to an old version I keep just for the binary on-or-off edge detection. If I have all major lakes decided early, it's good to use this step to draw their coasts too. Then I did a little manual mountain tweaking, suggesting the incising of valleys from water flow. Then I connected the dots and wiggled some plausible rivers into place.

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This is probably as much or more topo info than Zann wanted, so I'll quit fiddling with it and move on to politics and people.