Nothing. Use it and charge it when it gets low. There aren't any "tricks" to ensuring a healthy battery anymore, but Apple does recommend the following:
Be sure to fully charge your portable when you plug it in for the
first time, and then run Software Update to ensure you have the latest
software.
The new Apple notebooks (2009 and up) monitor the health of your battery and charge it accordingly, so there is very little maintenance required anymore. In fact, they no longer even require battery calibrations. All new Apple notebook batteries are pre-calibrated and ready to use.
As for usage trends to ensure longevity, that too is all handled by the OS and you can consult Apple's battery article for more details.
To be honest, storing the battery in the fridge or freezer, running it down and then charging it, pulling it out when using AC, or all the other myriad of "tricks" you'll read about are snake oil. Batteries have a limited life-span, and they start to deplete as soon as they are manufactured. That is the nature of batteries. Using them only exacerbates this phenomenon. There is no magic wand to turn back the hand of time.
In closing, Apple has some tips on how to maintain your notebook's battery. Just follow their recommendations, and enjoy your new computer.
I think the best advice can be given by Apple:
http://www.apple.com/batteries/notebooks.html
In a nutshell, don't store it at extreme temperatures, store it at 50% charge if it'll be off for a long time, use it occasionally (don't leave it plugged into the wall 24/7/365), or at the very least do a complete discharge every month or two, is my understanding of how best to treat it.
As to expected life, I'm seeing about 6 hours realistically on my MBPr (2.6GHz), with the screen brightness at something I can actually see.
Best Answer
You are overthinking this as there is nothing special about the lithium battery that requires special storage considerations. Just store it like you normally would; I put mine on a bookshelf to hide it from the inevitable human curiosity of the dog walker/plant waterer when I go on extended trips.
Your lithium ion battery is going to lose capacity whether you use it or not because the biggest factor in the longevity of a battery is age not how much it's charged. Now, the amount that it loses over the month is going to be negligible; you won't even notice.
I posted an answer that is relevant to this question: MATH FINDS TOP CULPRIT AS LITHIUM-ION BATTERIES AGE
Just leave it plugged in over the month and you will be fine.