Session 23 looks at meetings. I actually like the way meetings are done at my workplace - at least as far as my own role in them is concerned (the meetings that management have do not look like fun!). My biggest tip for an effective meeting is: have an agenda and know exactly what you are going to talk about. This way you don't get bogged down in unnecessary discussion.
For longer meetings, tea and biscuits/cake are also very good for morale!