The majority of my commute was narrow unlit country lanes, often and oh-my-god O'clock.
Tips;
A good "to see with front light."
A be seen front light and at least 2 rears, one solid, one flashing.
A head torch for repairs.
Flats or MTB/touring spuds so you can walk if you have to.
If there's a significant other at home some kind of tracking app on your, mobile so they know whereabouts you are. I used the now defunct Endomondo and Mrs D could check my progress in real time and reassure herself I was ok.
Good gloves and footwear - it cannkften be several degrees colder in the boonies.
Not a lot you can do about twits in cars other than making sure youre super visible. I never had much trouble with cars not giving me space, although I did have one deliberately try to put the willie's up me with a close oncoming pass. His arrest the following day for dangerous driving cheered me up no end, and the fact that the bobby dealing with him was a good mate of mine cheered me up even more.