Camelbak Lobo for spring/summer. Mule for fall/winter. 80/100 oz bladder.
REI small first aid kit
Spare tube
Park glueless patch kit
Old Gerber Cool Tool
Full frame pump (fits on all my bikes)
Clif Bars. Clif shot gels (to help out others).
Chain lube(Finish line wet) when it's snowy like now or in the summer when we get the afternoon thunderstorms. Just in case/never know.