For solo gaming, it turns out that (in my current flat) the ideal place for a solo game is at my desk so I can read docs/type a report on my computer while I play, and more importantly the game will not get "tidied up" by my girlfriend.
Due to my recent burst of gaming enthusiasm for Combat Cards, I decided to build a gridded board that I could use my 3d terrain on. The results were cheap and easy, but I'm sure I will build a better one at some stage.
The ingredients are pretty simple. 16x16" square of Foam core, wallpaper, paint, sharpie marker and ruler.
Why 16x16? Because combat cards uses a system of measuring that is based on division by 2. Very long range is the longest board edge, Long range is half that, medium range is half that etc. A 16" long board means that the smallest increment is 1". Coincidentally, it's also the perfect size to fit on the side of my desk as you can see here.
The terrain is all my Proxie models walls and Ramshackle Games resin pieces. The walls fit very well along the grid lines, and most of the resin pieces sit well on the grid. A couple of them are a bit thin and I'm considering making bases for them. I know many folks prefer free measuring in a game, but it's something I endure as a necessary evil at best. Having a gridded board means I don't have to measure, which helps me feel immersed.