During meetings, participants often get worked up in a discussion. As host, you should ensure that they have time to cool-down and distract themselves once in a while. In addition to sufficient breaks, make sure to use visual elements during each working stage of the meeting. Resort to various media.  
 
1. Flip chart: It is convenient for writing down questions on request. But it is also the tool of choice for presenting the results of workgroups.
Advantage: The paper charts can be displayed during the meeting to keep track of the developments.
Disadvantage: Inappropriate for archiving as the information from the charts has to be copied.
 
2. Overhead projector: Suitable for lectures and expert speeches, it is now regarded as outdated. Why not choose a beamer presentation instead?

3. Beamer presentation: A slide presentation running on your PC and beamer is ideal for lectures and presentations.
Advantage: Luminous technology, direct transmission from the computer, quick adjustments
Disadvantage: Ambient noise; not appropriate for rooms with strong natural light
 
4. Notice boards: Suitable for presenting workshop results
Advantage: Good visualization of group results
Disadvantage: Requires a lot of space
 

Source

Verlag für die Deutsche Wirtschaft AG http://www.vorgesetzter.de