2x plug kits, multi-tool, T-bar socket wrench with common socket sizes, headlamp, kickstand puck, small can of chain lube, superglue, large wrench to bend levers if need be, water, granola bars, medium first-aid kit with coagulant/gauze/scissors/bandages, sharpie.
i think some other stuff i'm probably forgetting. yes, it's all in that lovely green backpack i always wear.
*edit
zip ties, i need zip ties. thanks for reminding me, chris.