Battery cycles for rMBP and recharges?
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.