On day rides, patches are the only things I carry as bike spares. I run with Schwalbe Durano pluses & schwalbe inner tubes on the road bike (and Schwalbe Marathon Extremes or XRs & Schwalbe inner tubes on the tourer - 14,500km and only 1 "visit" on the tourer)
I always carry spare food, but have a medical condition necesitating that for emergency use. Otherwise just pump, tyre levers & multi tool kit, £5 cash, a debit/credit card, medical alert info card, inhalers + phone.