ear-buds. Both ears, while it does mean I can't hear as much, it also means it's harder for cagers to startle me by doing stuff like screaming, honking, or dropping their plows to scrape along the road.

Songs:
too many to list, I have about 120 song play list I cycle through. But it's mostly New Wave or 70's/80's punk, in the vein of the Talking Heads, the Clash, U2, etc.

Also, some days I do it up techno style.