I recently purchased the pdf's for the four issues of Touching History by Paul Darnell. These are amazing and I recommend them to anyone that has ever built wargame terrain or is thinking of trying. The pdf's are only $7.59 each and as far as I am concerned, the value is far more than that.
The first issue covers Napoleonic Peninsular; buildings and terrain. I really like the windmill and plan to give that a try.
The second issue covers the English Civil War. Oddly enough I am playing in an ECW game tomorrow. I haven' built any of the terrain.
Issue 3 contains two periods, the Sudan and WW II. In addition to the model and terrain building, there is also an AAR for both historical periods. The Sudan portion contains great pictures of the gunboat Paul built.
The last issue of Touching History covers North America; the Revolutionary War, the Civil War, and the French and Indian War.
Each issue contains ideas, advice, commentary and much more.
They are available at http://www.karwansaraypublishers.com/shop/
I haven't done anything but read them and I can already encourage you to buy them.