Originally Posted by
SansSerif
7 double woodfords.
Jus kidding. That is terrible advice actually.
Invest in a quality eye cover, ear plugs, and diphen/prescription sleep aids if available.
My advice to you.... 
Seriously, to the OP... get up periodically for a good walk. Had a friend who ended up spending an extra month in OZ due to DVTs (no, not DTs
).
Avoid the blood clots.