When I say semi-random I mean that the tools this thing is meant to hold are not completely themes, which is to say some are for woodworking, others for the drill press next to it, and... well, I startet with stuff I usually needed for the drill press, namely wood drills and forstner bits. Next were the drills for stone and metal to have them all in one place, and the japan saw and the bevel gauge jumped onto the band wagon, and a collection of bits did, too,justifying it's presence with my long-standing idea of a wall-mountet holder for my cordless screwdriver. You can decide whether that qualifies as random.
When I say tool organizer, I mean that it allows me to place the tools in ithang them from it. It does not actually help me prvent the loss of drills or bits or any other tools places on or near it. Well, actually, it is qhat it commonly referred to as an organizer, so...
When I say scrap, I mean pieces of wood, leftovers and stuff you would not usually use except for such purposes. There you go, I think that sentence was just a fancy way of saying nothing you did not know already. Anyway, moving on...
Step 1: Materials and tools
board(s) - I used a piece of leftover for the back and pieces that came with the packaging of some furniture (called particle board I think, and with fake wood surface, as well as parts of slats from an old bed frame)