Lezyne Medium seat bag
Lezyne Road Drive pump under bottle cage
2x Tacx Tao cages
2x Camelbak Podium Bottles
Topeak Mini6 tool
Spare tube
2x glueless patches (belt and suspenders approach, first flat, change tube, second flat, repair a tube and reuse)
Pair of tire levers

Snacks go in my jersey pockets. If I had a cell phone, that's where it would go too.

If I break a chain, I'm calling home. I haven't had good luck with field repairs of 10 spd chains.

On all day rides with variable weather I'll use a larger seat bag so I can stuff a light cycling jacket and leg warmers in there too, if the weather might call for it.

Rides near dusk will have me putting two turtle style LED lights on.