Common sense with investment and presentations.
How to improve your life? When you face on time to choose which is the best way to goal. For example, investment is confused by many choices.
In situation of a presentation, you will be faced on same situation of that. You have many topics, you have some interesting, you can tell many useful things.
However, the story don't need to many topics like one bug with many eggs. If you lost this bug, eggs will be broken at the same time.
You have to simplified your presentation with few topic eggs.