Obviously besides play the game but will you do anything special? Like for example: freak out with joy, or smell the plastic surrounding the game?
I think im going to read the manual first.

I'll read the manual while I'm sitting on http://www.google.com/imgres?um=1&hl=en&safe=off&sa=N&biw=1366&bih=653&tbm=isch&tbnid=XmbjwX_gRleFEM:&imgrefurl=http://en.wikipedia.org/wiki/Toilet&docid=KWNT6T6ymu3f1M&imgurl=http://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Toilet_with_flush_water_tank.jpg/220px-Toilet_with_flush_water_tank.jpg&w=220&h=245&ei=5AhyUIiIKaPV0gHp24HoCg&zoom=1&iact=hc&vpx=207&vpy=325&dur=476&hovh=171&hovw=157&tx=96&ty=109&sig=112278167573658766506&page=1&tbnh=139&tbnw=133&start=0&ndsp=23&ved=1t:429,r:7,s:0,i:156. It's a ritual with all new games.

Open a 08' Hanzell Pinot Noir, smoke a Monte Christo No. 4 Cigar, smell the plastic of the box and just be happy I am alive!! <3

Putting in my DLC codes carefully as I went to a lot of trouble to secure each one except for the Gamestop one which I got for preordering. I'm a little concerned that, because of total number of slots that may be in place, something could go wrong. I'd feel better if I could ask someone who's done it already but that's not possible and there won't be enough people ridiculous enough to hunt them all down day one.

Besides that though, smelling manual and installing.

Uh,guess I'll be smelling my Steam library.

I will install in and maybe check out the first couple of pages of the guide. Oh and I plan on getting Chinese food because there is a Chinese place right next to the Gamestop so I will probably eat that while I am waiting for the install.

Ah, the smell of my PSU burning as it struggles to pump out all the heat from my graphics card without exploding (which happening twice when I bought it).

Lovingly caress the computer monitor as I gaze upon the loading screen, whispering softly "My precious...." to it all the while.

well I'm getting the ps3 version so I'll probably be bouncing off the ceiling waiting for the install to finish

Same.

I'll probably read the manual first if I'm still capable because of the lack of sleep from the night before. Of course i'll read the manual AFTER i bathe in the new game smell.