There is no definitive checklist on how to write a presentation or speech. There are wrong ways to do it, but no right way. Everyone has a different style. This is mine:
1) Who is my audience?
2) What is my goal (or what is my theme)?
4) Find the core (or find the patterns)
6) Design the big picture, break into thirds
7) Add detail
8) How do I grab their attention (and keep it)?
It’s by no means set in stone, but this system works for me.