some rules of paceline riding apply - feather the brakes, don't slam them.
don't weave. in curves, keep your line.
keep the distance to the person in front of you and do not keep watchng their wheel, it puts you in a trance. Watch their butt and just in front of them so you can react to whatever they are doing.

at least you are not racing - packs are one reason why I don't want to try a race.