How I Prepare to Speak
This is the procedure I use to prepare for speaking at conferences. It may work for others, it may not. It may be good, it may be bad.
Be asked to speak
Be unsure about it for a few days
Be asked if you are going to move your ass and do it already
Think title
Send proposal at deadline +/- 48 hours
Spend the next week or two thinking of cancelling
Figure out what the title means
Spend the next N-1 weeks until the conference with a constant dialog in your head about what you should talk about
Turn that constant unorganized dialog into a little story
Write down the story headings in slides
Attend the conference
Sit in the back while you polish slides
Start talking
Show slides
Stop talking
Metelo en un while con un sleep y un continue en caso de que el punto 1 no devuelva nada, y ya tenés toda una vida