Need help impressing the crowd

[Living Near Shamu]

I am getting ready to open up my PS3 on Xmas. What should be the first thing I should do? Something that you thought - Dang, I wish I knew this BEFORE I went through all this stuff...

1) Upgrade the firmware as soon as it boots up?
2) Try and play a movie asap and WOW the crowd (family)?
3) Any automatic settings that need to be setup (audio/video)?
4) Which movie to play after its all up and ready?
5) Calibrate TV? How?
6) Anything else I'm missing?

I want the movie experience to be the best, because my wife is one of those that if something happens, if even the tiniest little thing is not perfect, she will say - I told you not to buy it yet.

I have about 20 movies already, most of the ones you'd recommend for first time viewing. I have a decent Sony surround sound (5.1) that has worked great all this time (will update in the future) so anything that will help me even convert a few relatives would be a success.