1. ON/OFF and lights; force off, lens re-attachment
2. Battery/charger/options; safety clips, 3rd party choices, AA choices
3. Memory Cards/formatting/sizes/backups; brands,
4. Buttons/locks; look for any L's - what are they for?
5. Diopter adjustment; memorize it
6. Playback/Display choices
7. Lens/attachments/techniques/needs/choice: normal vs. wide example
8. Shooting techniques; hand-held, tripod; chimp
9. Lens cleaning; UV filters are a "religious argument"
   Lens cleaning info online: http://www.digital-photography-school.com/how-should-i-clean-my-dslrs-lens
10. Sensor cleaning; you need to know how even if... See this image. Demo.
    Sensor Cleaning Info online: http://www.cleaningdigitalcameras.com/methods.html
11. "Check all the white buttons"; David Tejada And I will add to carefully check your INFO screen.

When shooting:

Which buttons do you want to develop "muscle memory" for as soon as possible?

Can you quickly and safely change a lens in the dark, when its raining, in a dust storm?