Laurie, here's a couple of "rules" very high on my list to follow when in a pack ride.
1-Check your mirrors and quickly swivel your head to check for those riders who may venture into your blind spot at least twice as often or more as you normally would while out there on your own. And, be especially sure to do this just before and whenever you might want or need to change your lane position...even within the same lane you're already in.
2-Don't be shy about using hand gestures(PG-rated "hand gestures", of course
), not only for turns and other normal maneuvers, but ALSO for things such as motioning with a quick "shooing away" motion at any rider[s] who you might feel are too close to you, or maybe, the ol' "Okay, go ahead and pass me then" swing of the left hand motion as another example.
