Pretty much like others. I remember before good quick links, I carried some new Shimano chain pins and a Swiss-Tech mini tool to pop off the end. I carry a CO2 and a mini-pump. I'll loan out the mini pump if I encounter a stranger needing one. One tube and a patch kit with unopened glue tube. A bit of gaff (duct) tape, although I figure one of the big tube patches would work for a tire boot. Select allen wrenches, mini chain tool. And a little plastic chain hanger.

In WA state, AAA will give you a bike breakdown transport as one of your service calls.