Here’s a tutorial / demonstration on making a nice looking bombed out building.
modeling
Modeling Dirt Roads, Tracks and Paths
Here’s a nice instructional video on modeling dirt roads, paths and tracks for your wargames table.
Building Rocky Desert Hills
The 1000 Foot General blog has a good tutorial on building rocky desert hills that are suitable for a wide variety of settings.
Casting Toy Soldiers In Pewter
The Toy Soldiers Forever blog has a video on proper techniques for casting your own toy soldiers from pewter. He also suggests some cheap sources of the metal.
Precision Cutting Foam For Terrain Boards
The Terrain Tutor has a very clever method for cutting precise sizes for terrain boards.