I'm usually up until 11pm, at wake at 7/8 am so 6 to 9 in weekdays, and maybe 10 to 12 in weekend or holidays, and thats counting a good half hour just trying to get up. Having a good night sleep goes a long way in a busy day.
Even with the whole 9 yards...er hours, i still depend on a good cup of coffee to get fully awake in the morning .
... except on LAN weekends (starting friday), which we only sleep on sunday to monday
.