Its not really in the same category as the things you listed, but I teach a lot of strangers online about Lucid Dreaming

Getting pretty good at it too!

I started to list things last night, and it got a little crazy, because Mersa wanted “diverse”
I’ll try to keep from running too wild...

Most people here like the old fashioned ways, but I know a bit about rapid prototyping of electronic and mechanical designs.

I could help others here with photo and video editing. All the software I use is free.

I make walking sticks from trimmed tree branches and furniture from standard lumber.

I am pretty good at changing diapers.

I have a lot to say about vehicle mobility. The biggest thing I’ve driven is a 20-ton armored personnel carrier. I actually prefer a minivan to an SUV unless I’m going offroad where ground clearance matters. Minivans handle better on the road and can haul a ton of cargo (or people).

Chess, primitive weapons, another fellow mushroom enthusiast, hiking, camping, fishing, used to be ok at drawing but haven’t practiced nearly enough.

   I have a little knowledge about a lot of things, which what happens when you've been around for a while.  I have a very good knowledge of edible plants and martial arts.  I'd have to think about what else would actually be helpful to slinging.org members.