If you think about it, stone (and bone) tools were pretty much it, at least before Europeans arrived and they had access to iron. Arrow points, spear points, atl atl points, knives, drills, scrapers, etc. were what they used. An experienced knapper could probably make an arrow point in 15 or 20 minutes; probably took longer to make the arrow shaft. Bottom line, they made and used a lot of stone implements; and reworked dull tools. Places where they camped (creeks, lakes) are good places to find stone implements...and there are places, they call "factories" where they found and worked the materials.
Took some Anthropology courses at the University of New Mexico; went on a field trip with a grad student there; somewhere between Albuquerque and Santa Fe. He knew what he was doing; he could find camping spots in an area where everything looked the same. He would dig a bit, and come up with stone knives, arrow points, snub nose scrapers, etc. He said one of his friends was digging with his hands in one of these spots, and ran a bone needle into his finger.
Don't remember what all we found that day, but we did find a mono and metate (corn grinding stones), both were intact. The metate was too heavy, but I still have the mono somewhere...used it as a door stop for many years. I guess point being, artifacts are where you find them.