From The Awl: "Some ground rules for reading while walking. First (and I really shouldn't have to tell you this), stop reading when you cross the street. Second, forgo magazines. The columns are too narrow, forcing the eyes to skid to a stop at the end of a line as soon as they've gotten going. Plus, magazines are floppy, and the wind gets grope-y with the broad pages. So go with a book, ideally a hardback that you can hold comfortably in one hand. (Two-handed reading while walking doesn't work for some reason. Also, with one-handed reading you can put your free hand in your pocket for warmth.)"