My experience additions

after-your-talk.txt

@@ -52,3 +52,7 @@ During Q&A you may have someone point out that you said something inaccurate,
 or missed pointing out something useful. Accept this sort of feedback happily.
 If you made a mistake, admit to it immediately. Being totally honest will win
 you more credibility than pretending to be right all the time.
+
+4. Admit what you don't know.
+
+If you're not sure, say so. Others seeing that you knowing that you are wrong is better than it seeming like you do not know you are wrong. It's better than having someone disprove you. In this case, say that you will get back to them, get some sort of contact information, and compliment their question. After admitting your uncertainty, you are certainly welcome to make a guess, and provide your rationale for your thinking.

before-your-talk.txt

@@ -146,6 +146,8 @@ $120 in postage.
 Another acceptance. This time to the most quirky, personality-filled, and
 well-executed conference I've ever attended. Worth every penny.
 
+5. Publicize it on social Media. Tag the event, an organizer, and use hashtags. Aim for retweets! Include pictures, gifs—keep it fun!
+
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 * An example proposal *

during-your-talk.txt

@@ -55,6 +55,8 @@ the chance to not lose that person.
 Remember: an audience's attention must be constantly maintained with energy and
 interesting content.
 
+*In this regard, don’t be afraid to adapt your talk, your expressions, gesticulations. More than once, I have gone off-topic, skipped a slide or two, walked around, and done things that I did not plan on doing in the talk. Gesticulating shows passion, and it also makes it more fun or easier to watch, which is a way to maintain an audience’s attention.
+
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 *Handling Questions*
@@ -76,7 +78,9 @@ professional.
 2. Respond graciously. Keep in mind that other people with questions are
 watching to see how you treat the asker. I try to respond in the friendliest
 way possible, even to challenging or somewhat antagonistic questions. I'll
-often compliment the person with "great question", or thank them for asking it.
+often compliment the person with "great question", or thank them for asking it. Smile! 
+
+3. Don’t be afraid to respond with a question in return. This encourages other participation, and is a form of give-and-take. It’s sort of humbling, too, showing that you care, that you think, and that you take their question to heart.
 
 One other trick I've used to encourage questions is outright bribing. I'll
 bring couple cool t-shirts and explain that I'll distribute them for great
@@ -88,6 +92,7 @@ sec on the question". You can also acknowledge them non-verbally with eye
 contact and holding up one finger. Don't let questions interrupt an important
 or dramatic moment in your talk.
 
+
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 *Body Language*