Well there are chargers for my phone and laptop. USB cables, USB cigarette adaptor for the car, aux cable, GPS mount for phone, bluetooth hands-free, aux-FM tuner, Ethernet cable to name but a few... Then there are all the various power converters as I really haven't found an all in one that I like, and I tend to need several on each trip.

Then I have my prescription medication in another bag as well as some in-flight care items left over from the amenity kits when they were full, never gets picked up by security and handy if you find yourself in the back of the bus. The cables are my go to gear whatever rental car I end up in!