- Do not drink too much coffee beforehand.
- Do not replace coffee with Diet Coke, it is not better...
- Do not drink too much coffee and drink diet coke and forget to eat.
- Check skirt length before prancing around on stage.
- Check desktop background for public-display-appropriateness.
- Close down applications that have popup notifications. Do you really want hundreds of people seeing that tweet...?
- Plug in your laptop power. Re-typing your password every time the screen powers down is boring.
- Remember your Mac-to-VGA dongle thingie. Bring one even if you don't use a Mac - there might be a cute/friendly/senior/cool speaker who needs one, and you can help them.
- Bring your slides/laptop. Not that important, especially if you've put it on dropbox.