jump box, floor jack, spare tire, small tool box with 3/8 & 1/4 drive stuff. wrench set 8mm-19mm. screwdrivers, hose clamps, couple qts oil, qt of brake fluid, qt of atf, jug of mixed coolant, tow strap, rags & hand cleaner.
I dont know why I carry tools, its not like Id have the part Id need if I broke down. I have all this stuff in a plastic bed tool box (except the spare tire) I used to carry jumper cables but now that I have the jump box, I dont. It also has a air compressor built in. very handy I suppose. Ive only ever used it on a freinds car.