A new definition of insanity: cranking a loose hinge screw back in its hole and expecting a different outcome. Get your screws tight by shrinking the hole. The method depends on the hinge and where it's installed.
On a Cabinet. Simply remove the small screw and plug the hole with a toothpick dipped in carpenter's glue. Let the glue dry, snap the toothpick flush with the surface, and reinsert the same screw.
On a Door. Wedge a block of wood under the door's bottom outside corner. Unscrew and swing the loose hinge leaf to the side. Bore out the stripped hole with a ⅜-inch-diameter bit. Spread carpenter's glue onto a matching ⅜-inch-diameter wood dowel and tap it into the hole until it's flush with the jamb. When the glue dries, drill a pilot hole into the dowel and drive a new, longer screw home.