Captain Richard has a great looking technique for making a stone road from paper printed from your computer.
Modeling
Making Modular Forests
This Very Blog has an interesting technique for making modular forests.
Scratch Building Barbed Wire
Spottinground has a photo tutorial on making barbed wire bases.
Modeling Desert Wadis
Here’s a nice photo tutorial on modeling desert wadis.
Making Pirate Ships
Here’s a nice photo tutorial on making pirate ships and the like.