Mercerius Atticus has created some very impressive flat buildings. This isn’t a how-to, per se, but the idea is worth passing on. These would be especially useful on the edges of a game.
Modeling
Modeling Ring Wraiths
Given the prices of Games Workshop figures, Germy decided to make some Ringwraiths of his own. The results are terrific.
Making Mesh Fencing
Wire mesh fences are a part of modern life, and thus should be a part of modern battlefield terrain. Here’s a quick method for making fences from gutter guard.
Building A Wilderness Outpost
Terrainthralls has a nice tutorial on building a wilderness outpost which could be used in a variety of settings.
Fallen Trees and Bushes Stands
Here’s an article on making fallen trees and bushes terrain pieces that could be used to designate rough terrain in any game.