I put a small pump in my jersey (specialized). Frame pumps tend to fall off. Save money by finding one on the road, where they fall off.
Then its: plastic tire levers, small patch kit. I have a small allen key set that doubles as a tire lever, all fits in a small pouch with the patch kit -made by Schwinn ~12 bucks. I add a few 4" zip ties for emergency repairs (light, strong, cheap and very versatile). Allen set has been very useful for long rides if something gets loose.