Pick a bedtime when you're likely to fall asleep quickly, and make sure it's at least eight hours before you need to get up. Keep to this bedtime for the next week and note when you wake up each morning. If you need an alarm to wake up, if it's difficult to get out of bed or if you're tired during the day, eight hours isn't enough sleep for you. Move your bedtime up by 15 or 30 minutes the next week. Continue doing this each week until you awaken without an alarm and feel alert all day. When you determine what you think is an ideal bedtime, cut 15 minutes off it to see if you're sleepy the next day. If so, add those 15 minutes back -- and you've nailed your PSQ.