I took a pretty easy run around Hanover Pond and the surrounding area this morning. I was concentrating on my stride and trying to got heel to toe. It's surprisingly hard to do steadily.
One thing I don't like about it is it shortens my stride, forcing me to take more steps to cover the same distance. It's also almost impossible to run up hill while hitting your heel because you land midfoot. This is going to take some getting used to.
I ordered a Garmin 305 to monitor my heart rate, pace, etc, so I should have that by next week. It's an expensive gadget, but I can use it for my biking and running, so It should be useful.