The One of My Men Became Restless Blog has a photo tutorial on making hedgerows. I have threatened for years to make hedgerows, and yet never seem to find the time.
Modeling
Using Epoxy To Make Realistic Eyes
Here is an article on using epoxy to make some cool looking eyes. Beyond the horror applications, however, I think the same technique could be used to make some very nice looking markers for wargames.
Scratch Building A 15mm Mortar
Here’s a tutorial on scratch building a 15mm mortar.
Modeling A Western Style Water Tower
This tutorial explains how to make a water tower suitable for Wild West games.