With all the talk about cyclist's safety, I think there should be some mention of what walkers and runners should do to keep themselves safe. Walkers and runners are to go opposite oncoming traffic.
This allows the pedestrian to get out of the way if a driver doesn't show obvious signs of giving them room. Walking against traffic also allows a driver to see you sooner as you are approaching the driver instead of going away from them. This, and a reflective vest or flashing light, will help keep you safer.
Cyclists ride with traffic, and follow the rules as if driving a car (stopping at stop signs and traffic lights, signaling turns). This predictable behavior makes it easier for drivers to anticipate what the cyclist intends.
More information is on the National Transportation Safety Board web site. Remember, and teach your kids, "Ride with, walk against."