2 tubes
leave the patch kit at home
2 tire levers if you need them
Road Morph G pump
Most important thing! Remove and replace tube at home at least a couple times to make sure you get it down. It's extremely easy to damage the tube with tire levers. Experienced riders prefer to remove and replace the tire by hand. Always inflate the tube to just round before installing.
Here are a couple of videos on flat changing:
However the above videos, having been made by children, don't show the most important steps - how not to get another flat immediately. For those, see this video: