Little things that can help speed a round up:

No more than 2 practice swings.
No need to use range finder 70 yards and in.
Walk or drive to your ball and be ready to hit! Ready golf! No need to all gather at one ball to watch someone hit then proceed to your ball next.
While someone is hitting you can be checking your yardage or even take your practice swings.
Keep it to 3 minutes looking for lost balls. Move on!
Play the new local stroke and distance rules.