This is a 30" by 40" piece of taskboard that I bought yesterday. Taskboard is a fibrous kind of matte board made from recycled wood pulp favored by architecture students for making models. It is flexible, cuts and sands easily, and isn't exactly cheap. It comes in 1/32" to 1/8" widths. This board is 1/8" thick, and I use it sometimes for basing Hirst Arts constructs like modular dungeons or buildings.
Between creating stuff for RPG's, painting miniatures, or building plaster terrain, what I'm interested in has a lot to do with my mindset. If I'm fired up and creative, then I'm using doing RPG material. If I'm centered and focused, then I'm painting miniatures. If I'm just needing mindless drudgery, then I'm casting molds of plaster, which doesn't take a ton of energy and focus but will keep me occupied. Given how I felt back at the "T" entry, I'm obviously in a terrain-building mood. So I bought a ton of basing material. We'll see how that goes.