I knew a professor that loved getting freshmen classes because he could disabuse them their Yankee in king Arthur's court ideas about how easy it'd be to bring technology back to the past. He had a whole slew of experiments that would explore path dependence and the difficulties of creating technologies with the available resources. Nominally this was to help them not underestimate the intelligence of early humans, but I think he enjoyed it.
These things are easier if you have an idea ahead of time of what you're making, but that has to work in a cultural context and that still doesn't mean they're easy. For instance, how would you would you build a useful saw out of stone? Can you recognize the wild ancestors of wheat and convince someone to keep at the process of domestication for thousands of years?
It's likely that ancient humans were adept at many of these things, like salt preservation, warm clothing, contraception, spun fibers, and boats. Many of the others (agriculture, wheels, etc) simply wouldn't make sense outside their native cultural contexts.
In the meantime, you'd probably have to learn from them the basics of survival.
These things are easier if you have an idea ahead of time of what you're making, but that has to work in a cultural context and that still doesn't mean they're easy. For instance, how would you would you build a useful saw out of stone? Can you recognize the wild ancestors of wheat and convince someone to keep at the process of domestication for thousands of years?
It's likely that ancient humans were adept at many of these things, like salt preservation, warm clothing, contraception, spun fibers, and boats. Many of the others (agriculture, wheels, etc) simply wouldn't make sense outside their native cultural contexts.
In the meantime, you'd probably have to learn from them the basics of survival.