Blacksmithing is a handy skill to have. Not only can you make your own blacksmithing tools, but you can also make your own leatherworking tools (some of them at least). I've made a couple of hammers, several sets of tongs, punches, drifts, etc., as well as a coal forge and a gas forge. For leatherworking I've made a couple of punches for belt loops in holsters, a freehand stitching groover and a beveling tool, mostly out of scrap metal from the shop.