When i was younger I could laze in bed for hours. I would first
open my eyes, realise it is only 7 am then roll around and go back
to sleep till 12 or 1 or 2 or whatever.
But with age.. creeping up on me, I found that I have LOST THIS
ABILITY!!! 
It's horrible leh, if i laze in bed, I just end up having a bad
headache. If anything wakes me up after 6.45 am (My usual waking
time), I just can't sleep anymore. Even if I slept at 3 or 4
am...
So who can stay in bed WHOLE day type.. share technique
lehh...
Sigh. Time 7.10 am. Woke up at 6.45 am. Today sch holiday dont even
have to wake up sooo early....