Keeping the Wedding Party Occupied

I've been brainstorming what to delegate to the bridesmaids, groomsmen and the rest of the wedding party so I don't get too overwhelmed. Any thoughts? Here's a list of tasks I have so far:

Assemble and be in charge of wedding day emergency kit (the one with thread, pins, breath mints, etc) _bridesmaid

Move chairs from ceremony area to reception area_groomsmen

Clockwatcher (the person who keeps us on schedule)_bridesmaid

Designated videographer_brittany or wes

Auxiliary picture taker

Keep record of gifts received, write down guests present_bridesmaid

Food/cake/drink coordinator_parent/bridesmaid

Messenger (person who communicates messages to family/groom/guests)_bridesmaid

Keeper of the rings_best man

Errand runner_groomsman or Dallin

Guest greeter_groomsmen AND bridesmaid

First person to toast (and encourage others to toast)

I know I know, I'm sooo particular (or probably another word), but I think that if everyone has an idea of what they can do beforehand, the day of won't be so chaotic and people won't stand around wondering what to do. thoughts?