Here's a nice breakdown of all the rule changes going into effect for the 2011 season. A lot of them are tiny things that don't have a large impact, but here are some notables: - Kickoffs from the 35 yard-line. - An attempt to clarify the Calvin Johnson rule about maintaining possession while going to the ground. It fails. - The reintroduction of the "football move" requirement for completing a catch. - A tweak to the rules for kickoffs that go out of bounds.