Mitch’s Wargaming and Modeling blog has a post on making a figure eight Pictish house. The result is wonderful.
Modeling
Quick Hedges
The Warbard has a tutorial on making quick hedges.
Advice On Applying Decals
A League of Ordinary Gamers has an article on how to apply decals.
Tutorial: Making Lava Splashes
Lava seems to be a popular terrain base style — perhaps the whole Mt. Doom thing is stuck in people’s minds. Here’s a tutorial that bills itself as explaining how to make lava splashes, but also has a great deal of information on how to simulate lava in general.
Making Sub Roman Houses
Here’s a post on making “sub roman” houses — the style of dwelling, however, probably covers five hundred or more years.