Useful Links

Physical Aspects:
http://www.presentationtrainers.com/Free-Stuff/Fundamentals-of-Public-Speaking.php

General Tips
http://www.selfgrowth.com/articles/Evans24.html

#1, #2, and #7

http://www.amanet.org/training/articles/Seven-Principles-of-Effective-Public-Speaking.aspx

Audience:
https://www.boundless.com/communications/textbooks/boundless-communications-textbook/analyzing-the-audience-7/the-importance-of-audience-analysis-37/the-benefits-of-understanding-your-audience-161-8007/

Tone & Pitch & Vocal Fry + TED Talk
https://www.ethos3.com/2015/10/how-your-voice-impacts-your-public-speaking-success/

Vocabulary (word list with definition, pronunciation, and example)
https://www.vocabulary.com/lists/184869

Glossary - Comprehensive List of Terms with Definitions
http://www.speaking-tips.com/Glossary.aspx

Build Vocabulary - Avoid Repetition
https://youtu.be/jdGgDEjmGhM

Tips on Using Vocabulary in Public Speaking
https://www.ethos3.com/2012/04/choosing-appropriate-vocab-in-presentations/

Steve Jobs - Top Three Speeches
http://www.pcworld.com/article/238905/top_three_steve_jobs_speeches.html

Body Language - Art of Communicating
http://www.artofcommunicating.com.au/public_speaking%20tips/body%20language.html

What Is Your Body Saying?
http://totalcommunicator.com/body_article.html

Various Articles (Body Language, Appearance,...)
http://www.speaking-tips.com/Body-Language/

Powerful Body Language - Keys
https://www.eonetwork.org/octane-magazine/special-features/three-keys-to-powerful-body-language

Body Language Expert Mark Bowden
https://www.youtube.com/watch?v=rk_SMBIW1mg

FBI - Body Language
https://youtu.be/qXCns4QiL1Q

Body Language Secrets - Documentary
https://youtu.be/IqsAhmTn7n4