Counting and therefore distributing spoils fairly.
I would become a well-loved chief and would probably get laid more than I currently do, although the hairy partners may not be of my liking.
i'm a fairly deft hand at pottery. i'm also decent at fiber crafts. depends when and where during the stone age, of course, that's a pretty big expanse. if i'm really lucky, i'd be in one of the many cultures with special spiritual roles for trans folks. i've also got good rote memorization skills, so i can help with oral history.
I'm a natural at shooting a traditional bow.
I know every edible plant in my area, and some that get you high.
I can find north without a compass, day and night.
I can make a fire from things I can gather in the woods.
I know how to safely fell a tree, split logs and build a shelter with hand tools.
I know how to act around most predators and have experience handling a spear.
I think I'd do reasonably well.
Sometimes I wish I was born in the stone age. My ADHD is completely gone whenever I'm in the wild.
I'd probably be something of a builder/ "engineer."
I'm not actually an engineer, but I have a knack for utilizing what I have around me or simple enough objects to serve other goals. I suppose I'm what people used to call a Macgyver or "mechanically inclined."
It would take time to get back into it, but I was turning out decent knives, spear points, and arrowheads for a while there. Nothing that would blow anyone's mind as art, but pretty enough and usable.
One of those things I did just because I wanted to see if I could, and it turned out to be really relaxing and enjoyable. Arthritis took the enjoyable and relaxing part away, so I stopped, but on a survival level, I could get the job done well enough to make up for being a bottom tier hunter.
Being that person providing a better method halfway through a process. A cave person standing on top of another to cave art the ceiling? Halfway through I go "...You know you coulda just grabbed the log from outside, leaned it against the wall and climbed it". Someone halfway through whittling a bowl? "Oh, yeah, I saw some coconuts on the beach they'd be perfect".
I have the great hobby of Looking At Random Things, but the bad habit of assuming everyone else saw those things too so they must be doing what they're doing for a reason lol. That all said I'm sure I'd be dead from dysentery within a week or smtg, they wouldn't have to suffer me long.
Everyone alive right now must have ancestors who very literally did live & survive though the stone age and the ages before and after that. Wish I knew what my ancestors did to survive stone age, or better still if I could like watch them in a time lapse video. I guess I might have run away from stone lifting to go be a shepherd or something.
I can make soap from fats and lye (from wood ash). Getting the right balance of fats/lye would be tricky; I've never used wood ash so I'd need some time to work out the right formula. But, theoretically, I could make handmade soap for everyone.
If I had my current knowledge, low-level iron forging, agriculture, and architecture (cisterns, wells, deep food storage) and very rudimentary medicine because the wife is obsessed with various herbs that are used to make our modern medicine
If I was starting from scratch, probably just be decent at hunting because I have good hand eye coordination and maybe tracking
I'd be a good forager, gatherer and tracker. I have a knack for identifying plants and animals and spotting signs of their presence. I'm sure with a bit of training I could become decent at trapping too but I've never done that.
I'd also be good at art, be that cave wall painting or figurine sculpting/carving.
I guess I could build a cart/waggon for easier transporting the dead animals the other guys hunted. Not sure if that would be much appreciated or if I just would be the weird guy again.
Maybe a plough would be more useful.
And building/improving shelter.
I could also make a fire after failing some time I suppose.