I am a road rider.
I carry a spare tube, patch kit, CO2 inflator with extra cartridge, three prong hex key, 2 plastic tire tools, small phillips screwdriver, convertable cable with small nipper, spoke wrench, cell phone, $1.00 in coins and $20+ in smaller denominations, ID/Drivers License, 2 water bottles, and fruit in my jersey pockets. I also keep several spare spokes with nipples in the seat tube.
I prefer to ride in fairly desolate areas so I either transport my bike to a starting point or ride through the suburban jungle to get to where I like to ride. Average ride is 40 miles, more on the weekends, less in cold weather.