Earlier quoted context omitted.
Those are great tips! As a 2+ year fan of the FiveFingers I don't think I could have put it better myself, although I would add that you should always maintain good posture as well (shoulders back, head up, back in neutral alignment, hips in line with shoulders).
Since you guys have been using these for so long, maybe you could answer this question for me. How thick are the soles? If I step on a nail or broken glass, will it penetrate the sole?
The soles are really strong, but I wouldn't rule out a perfectly aligned spike or blade (scalpel tip or something?) going through -- but to be quite honest, something like that would probably damage a traditional running shoe; protection isn't a substitute for looking where you are going.