When you sleep less the desired amount, add a reminder on your calendar to go to bed early tomorrow

Google Calendar is a free time-management web application offered by Google. Turn on Applets to add the most important information, right into your calendar, automatically — and get custom notifications about the events that matter the most to you.
Get important notifications on your phone via SMS. This service has a cap of 100 SMS messages per month for users in the US and Canada and 10 per month for those outside of North America. To avoid having Applets paused until the next month if you hit the limit, try the Notifications service. Some carriers outside of the US are not supported yet (learn more here).