I try to get 8 hours a night, usually don't and end up trying to catch up in the weekends. If I sleep too little over a longer period I get depressed, weepy and irritable, but not necessarily more sleepy. I can even have more trouble getting to sleep then because I feel stressed. When I'm training a lot I need the same amount of sleep, I just need it MORE! During long vacations I fall into a rhythm of falling asleep at midnight and waking at 9, which seems to indicate I should be getting 9 hrs and not 8.
If I'm really sleepy at work I lock the door and take a 20 min nap.
I have a large office with a sofa and I figure I might as well nap properly and be productive afterwards than sit there drooling over my documents for hours...
The most important thing for me in getting enough sleep is really getting to bed at the same time every evening. The more of a habit it is to me and my family and friends, the easier it is.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett