To add to what hooknline posted; KY-jelly/lubricant, an old Coke bottle, 4 to 5 feet of garden hose, a piece of PVC pipe about 2 to 3 inch diameter about 18 to 24 inches long, come-a-long, adjustable rope cow halter, 10 to 20 foot length of good stout nylon rope (stays more flexible than cotton), thermometer, stethescope, watch w/a second hand (or a stop watch), mineral oil, ear tagging supplies, couple of pkts of Re-Sorb or other electrolyte mix, couple of packets of powdered colostrum (if you don't have any in the freezer), towels, a balling gun, tag cutter tool, and a trochar. Just a few I can think of off-hand.
Katherine