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I guess it's a bit if both, haha. I think there is always room to improve my sleep pattern! For example today, I am dying of sleep because I went to sleep at 2:30AM and had to get up at 8:30AM :(

If I do that sort of thing to often, say five days in a row of 6 hours sleep, by the end of it, I am starting to come down with a cold. I hate being unproductive due to fatigue, therefore I resolved to change my sleeping and waking habits to get the most out of my day. I find, if I am in bed early and up early 6-7am, start work by 8, what I achieve in the four hours of the morning amounts to a full days work, and only half the day is done. I then have the late afternoon off to go and play. =)