Here's what I carry on the bike:
In the tail under the rear seat
Assorted sockets (mix of 1/4 and 3/8 drive, ranging from 8 to 17mm)
Assorted JIS screwdriver tips in both flat and cross tip, various sizes
Assorted hex key tips, various sizes
Ratchet handle (with 1/4 and 3/8 drive adapters for the sockets)
Open-end and box-end wrenches in sizes from 8 mm to 17mm
Needlenose pliers
In the right saddlebag
Slime air compressor, fed from the cigarette lighter socket on the right fairing
Tire plug kit (has yet to have the shrink wrap off; with luck it never will.)
Home-built jumper cable with SAE connector to mate with the lead "permanently" connected to the battery
Not shown below: digital air pressure gauge, lives in the right fairing pocket
All the pieces out for inspection
Packaged up and ready to be stowed
All tucked away and ready to roll