Here’s a neat technique for making flexible scattered terrain.
Modeling
Modeling An Ancient Yew Tree
Dagger and Brush as an excellent tutorial on modeling an ancient yew tree.
The article also includes some interesting natural history on yews and — interestingly — owls.
Using PVA (White) Glue In Wargames Terrain
This tutorial explains some of the uses of common PVA (white, Elmer’s) glues in making wargames terrain.
For my part, I use the stuff mostly to secure flock, sand and so forth on basing. It is also my go-to when gluing together form-core buildings.
Easy Corrugated Iron Wargaming Buildings
Here’s a tutorial on making a wargames building to simulate a shack made of corrugated iron.