Friday night -> stayed up till around 5am so I would get extra tired and theoretically last longer
Saturday -> woke up at 11am, pottered around for two hours, went driving lesson at 1-3pm come back home, cut the grass and then kipped on the couch for 30mins before i got told to piss off to my room if i wanted to sleep.
Power napped from about 5:15 till 7:45pm getting in the extra Z's
Left for DMZ at 9:15, didnt arrive till like 10:45 cos my mate was bare late (30mins) for the bus and we got lost in thorton heath

Seemed to work pretty well, was still wide awake when I left
How do you prepare?