As a regular long haul flyer in Y this is all great advice...I usually try to get a seat near the front of the Y cabin as somehow psychologically you don't feel quite so packed in with a sea of rows in front of you...plus you get off the plane a bit quicker at the other end. I tend not to eat much but do make use of the abundant free booze if I'm in the mood (and not crashing straight into work on arrival). I just put a blanket over me, try to get some sleep and have something decent to read/watch en route.