Bob’s Miniature Wargaming Blog has what I think is a very neat construction method for making littoral terrain for his DBA Viking Army. The littoral is the part of a body of water that is close to shore.
modeling
Modifying Heroscape Terrain
Wargaming Miscellany has a post on modifying Heroscape hex tiles.
Building A Shanty Town
For those modern and near-future games, here’s an illustrated tutorial on making a really neat shantytown.
Making Concertina Wire
Here’s a great tutorial in making some very realistic concertina wire for your 25mm – 28mm miniature games.