Wargame News and Terrain has a tutorial on modeling wooden pallets
modeling
Basing Figures On Washers
Here are some great ideas for basing figures on washers. This is exactly the technique (and the same fender washers) that I use.
Making Rocky Terrain From Wood Chips
Here’s a nice tutorial on making rocky terrain from tree bark chips.
Making a 15mm Graveyard
Here’s a tutorial on making a graveyard for 15mm scale figures. It could easily be scaled up, though.
Working With Tree Armatures
Here’s a good tutorial on working with tree armatures.