a story to tell and
are an expert on your topic, people will appreciate you passing on knowledge.</p>
<p>Also, as it is a recurring issue: if you intend to joke during your talk, make
sure that you can deliver it well. Rehearse. People might still not get it, be
prepared for that.</p>
<p>On the topic of jokes, again: lighthearted talks are great and humor is cool.
Mind that not everyone shares your sense of humor and you have 200 people in
front of you.  If you joke backfires and people don't appreciate it,