Font:
This point was touched, but not detailed. If you are carrying a presentation to be run on some other system, make sure that you use the basic fonts/ bullets etc, not the fonts downloaded on your system.

PPS:
In many scenarios you would like to leave soft copy of the presentation behind with the audience but would not like them to use the matter. There is a simple way to stop this from happening. You can save the presentation as "PowerPoint Show" (.pps) from the 'Save As' option that creates an executable show.