planning a productive meeting- what to do during

The important part of the meeting is when the meeting  actually starts. After planning everything it is important to follow each and everything properly. first of all start the meeting on Time

At the beginning of the meeting choose somebody to take notes of the proceedings also provide the agenda to every member of the meeting giving information about the objectives of the meeting. 

The mystery to a productive meeting is beginning and closure on time. Begin on time, end on time - a meeting should not exceed the assigned time. To do this, present the plan, examine the objective and length of the meeting, and clarify the guidelines for the gathering.

Create meeting rules and follow them.
This could be a typical practice, for example, everybody being permitted to help vocally
at meetings uninterrupted. When a rule is executed, actively present people are required to take after and ought to be helped to remember the rules at the start of the meeting and at every opportunity it becomes necessary to do so. Give the foundation for each of the topic which is selected for discussion regarding the solutions and restrictions.

Support participation however keeps the points on track as members can divert the discussion to other matters which are not listed on the agenda. Examine clash; look for settlement, then compress as you come to check whether everybody agrees with a definite choice.

references:
http://quality.wisc.edu/effective-meetings-during.htm