input question: how do you cut your finger nails?

output answer: use a nail clipper to shorten them.

input question: what to do with zucchini tops

output answer: blanch them in salt water and serve them as a snack

input question: How do you keep the heat from a fire inside a primitive shelter?

output answer:
Build a stone wall behind the fire so that the exposed side of the fire is still facing you, this will reflect the heat back into the shelter.