2 tubes, tire levers, multie tool, rubber gloves, first aid kit, wire stripper/cutter, electric tape, blade conectors, (I like and use andersons but on the road I prefer not to carry my anderson crimper) zip ties, fuses, pump, sun block, paper towels, handy wipes, old glasses, a pen and a bit of paper.
That stuff stays on my trike in a topeak bag. Small quanties of each.
I have not needed all that stuff but several have come in very handy. Including tending to a lovely lady with my first aid with ointment and bandage. Modest road rash. Never know what you'll need. Almost forgot. I have a cobra tube for the rear wheel of my trike. So far no flats on that wheel because a removal on the road would not be fun, So the cobra is a 2 ended not circle tube. Hope I never need it but if so then I cut out the old and stuff in the cobra. There is an overlap and the valve stem goes through a hole to conect the circle.