2 or 3 tubes
Levers
Tyre boot
Multi tool
Swiss army knife
A few cable ties
Stick on patches
Chain lube if over 300k
Pump is always on the bike.
Might take a spare tyre if the roads are sketchy.
I used to carry a shifter cable but after doing my ultegra at home I figure its way too fiddly to manage on the side of the road.