Some highlights:
Don’t be a fright.
Don’t faint on the road.
Don’t criticize people’s “legs.”
Don’t cultivate a “bicycle face.”
Don’t wear laced boots. They are tiresome.
Don’t imagine everybody is looking at you.
Don’t go to church in your bicycle costume.
Don’t wear a garden party hat with bloomers.
Don’t ask, “What do you think of my bloomers?”
Don’t scream if you meet a cow. If she sees you first, she will run.
I personally would very much like to see “a garden party hat with bloomers.”