Don't forget to sign up for the massage in the Pier.
The Pier's Day Suite is nice for looking out at the planes, it is quiet and you have your own little cubicle.
You should totally do the half day in the airport, just for once. If you do lounges frequently enough you'll get bored, but if you want to do it, why not!
(And, just for kicks you can try to go to all the lounges!)
You should definitely get a cabana in The Wing because the experience of showering without an enclosure is superb!
And in contrast to what others write, the worse you dress the more people will know you are in first class
