In Fizik small bag:
1 tube
1 co2
Inflator
2 tire levers
slime patch kit
mini tool

2 water bottles on the bike. Additional camelbak insulated bottles in jersey pockets as needed for how long a ride I'm doing and if there will be water stops.
2-3 gels. Maybe a bar if it's going to be a really long ride.
Drivers license, ATM card, health insurance card and some cash (usu $20) rubber banded.
Cleat covers.
house key/car key
iPhone +/- ziplock bag.

Bazooka

RoadID

Set