As I am new to running... I found the stretching myth interesting. I must admit I tend to warm up with a walk... Gradually increasing speed. I do stretch afterwards - mainly because I have "tight" hamstrings - I don't do it excessively then though. I am finding, stretching at odd intervals during the day, is definately helping.... I do it probably 2-4 times a day - depending on how tight they feel.
" Success is what you make it, there's no better time to make a change than the present."
"Wherever you go, no matter what the weather, always bring your own sunshine. "