There are many common mistakes that can be made in an official meeting. These mistakes can range from not following proper procedures to not participating in the discussion and not listening.

Examples of mistakes that can be made include not following proper procedures, not participating in the discussion, and not listening.

Common mistakes made in an official meeting can be:

1. Not taking notes
2. Not preparing for the meeting
3. Not conducting the meeting
4. Not providing each individual with a copy of the meeting agenda
5. Not following the agenda
6. Not being prepared in the meeting
7. Not inviting participants
8. Not having a clear agenda
9. Not having a set time limit
10. Not using a list of questions to ask