The Wargames Table has a quick tutorial on making roads from cork tiles.
Dampf’s Modelling Page has a short description of how he created an objective marker. I really like markers like these that look like part of the landscape, as opposed to little cardboard counters or somesuch.
On Board Game Geek, there’s a nice set of instructions on making high quality circular counters.
Here’s a nice video on modeling and painting flames. It’s basically a matter of gluing flock to a wire and then painting.