The American Academy of Pediatrics is one of the best sources around for commentary and information on youth sports injuries. I've found the AAP's advice unfailingly sensible and accessible.
Case in point: "A Minute for Kids," a series of 60-second audio files - 18 in all - that take on important topics. I particularly liked reports on eye protection (42,000 eye injuries occur during sports play each year; half of those hurt are under 15) and adult conduct at youth sports events (Stop yelling, you're embarrassing your children).
Nothing revolutionary here. Still, because these words come from our kids' doctors they carry extra weight.