Terragenesis has an article on building laboratory equipment for mad scientists. The photos show an amazing use of various household and electronics bits.
Modeling
Miles Of Barbed Wire
Tim’s Wargaming Blog has a photo tutorial on making “36 Miles of Barbed Wire.”
Tutorial On Using Amazing Mold Putty & Amazing Casting Resin
The Hawgleg site has a tutorial on using Amazing Mold Putty and Amazing Casting Resin to make models. The two products are available at stores like Hobby Lobby
Modeling A Shack From Scraps
This is a great video on modeling an abandoned farmhouse or shack for your wargames table.
Using Teddy Bear Fur To Make Grass
The Earlswood site has instructions on using teddy bear fur to make patches of grass for your miniature wargames terrain.