So you're riding along an unfamiliar road and you come to the most astounding thing, it's amazing really, and you want to be able to tell people about it, to remember it later. No simple picture will do for this -- you need description, you need context.
What do you do? Do you keep a pen and a small notebook in a pocket? Carry a tape recorder? Whip out your blackberry and start clicking away?
For a sunset, a tricky turn in the road, a conversation, an unexpected animal, a license plate -- what do you do?