The Too Fat Lardies site has a tutorial on making stands for trees and other foliage from old cds.
Modeling
Green Stuff Sandbags
The Dark Future Games Blog has a tutorial on making sand bags from “green stuff” epoxy putty.
Making A War Camp
Here’s a nice video on making war camp scatter terrain from junk.
Making Trenches Blog Series
The Roundwood’s World blog has a very nice series on making trench system terrain boards. I’m inspired.
Of Hills And Mountains
The Colonial Wargaming blog has a discussion and photos of various forms of tabletop hills and mountains, from the “rugged” to the “stepped” to the classic General Tremorden Rederring style profile mountains.