My typical:
-
Park patch kit with a spare master-link inside, along with 2 levers in a thigh pocket;
-
spare tube in a jersey pocket;
- water bottle in the cage;
- mini tool in a hip pocket;
- joints and a lighter in the other hip pocket;
- mini-pump in the lycra. Seriously. I've figured an angle that I can put it behind my right thigh and it is held in place by the compression of the shorts. The pump is mostly plastic, and the angle it rests is quite splint/brace-like, so I'm not worried (too much anyway) about impaling myself.
I'm new to the tubeless thing - only set it up for the first time last week but am loving it. That said, I'm used to the PITA of changing a tire trailside and rather than finicking around with plugs and goo and CO2 in the muck I'll just throw a tube in. This might change as I learn more about how to use plugs and/or boots (or if I find myself putting a tube in every second ride...)
On the rare occasion I ride with a pack all the above goes in there, along with a couple litres in the bladder and a first aid kit, but most of my rides are sadly short enough that a single bottle will usually do, or the longer ones consist of laps with stops back at the car to top up the bottle.