For genuine effectiveness, Briefings should be interactive. Don't simple tell the other fellow (s) what you're planning to do, but also have them tell you what THEY will do.
For example: .... in the event of a critical failure prior to V1, I will say "Stop"... brake... thrust...etc. What will you do during this event?
Amounst other things, if there are any misunderstandings about procedures, SOP, etc, they will "come to light" in a much more comfortable environment that when the abnormal event is actually taking place.