Interesting comment about riding just inside the lane. Goes perfect with the good mirror, and the concept that no car overtakes you without you eyeballed it.
I've noticed the same thing, but if the shoulder is really wide enough, I'd rather just put another foot or two between me and the cars. Still eyball that car coming.
Tunes while you ride are nice out in the sticks, and the car count is low. In the town, listen for cars.
The helmet for me, is a device to make a boo boo more comfortable. You know, lay it down in the gravel oops, that sort of thing. I don't wear a helmet capable of saving my life if a car hits me, unless actually riding faster than 30 mph.