Stuart from the Lost and the Very Damned gave us this awesome article for making dungeon tile scenery from blue extruded polystyrene. You could also take his ideas and apply them to make brick walls for tabletop wargames.
What I thought was really interesting is the point he makes about writing it down to prove that you know what you’re talking about. It also helps to keep your mind focused on the job at hand. It is a really well written and photographed tutorial with easy to follow steps. If you missed issue two, Stuart’s article in stand alone format is well worth the read.