Have spent two evenings in creating a simple board for the miniature wargame Song of Blades and Heroes. Went amok with my water color on a large white paper, and created an abstract painting that could resemble (with quite a bit of imagination) some kind of grassy nature area. I attached the painting onto a piece of cardboard and then covered it all in transparent film (normally used for protecting books).
I made the board 60x60 cm, so that it is suiteable for 15 mm miniatures.
Speaking of miniatures... I have no 15 mm miniatures... To start with, I will just use small wooden markers or similar, to test the rule system. Then I will buy a few warbands from either Pendraken Miniatures or Magister Militum.