Similar to MThorman's tether, I have these coil leashes for nut tools which were robbed from a set of radios. Many years ago I lost a nut tool into a talus field several hundred feet below and it convinced me to use a tether (and definitely have one on my loaner nut tool!). Its quite nice if you take a nut out at a difficult stance that you can just leave the nut on the draw and rope, drop the nut tool onto the tether and climb through to a better stance to rack them both.
Although I now use the 'fancy' Wild Country nut tool with a broad base to hit with your palm on stubborn nuts, I still think the basic BD nut tool is a great one. I added some 1/4" black fuel line held on with electrical tape to make the bottom softer when banging on it with your palm and it works quite well. The nut tool doesn't work as well for opening bottles with that side after but you can always lever a cap off with the tip of the tool
I also sewed some small (3mm?) accessory cord loops onto generic Well Lamont leather work gloves to make racking them easier between belays. I have been really impressed with how well these gloves for cold belays, long days, even ski touring for much less than the BD or Petzl gloves.