2. Sleeping Late on the WeekendSleeping in on the weekends is perhaps one of life’s greatest pleasures. However, this little indulgence is just as damaging to your biological clock as a long flight. It’s a form of social jet lag that resets your internal rhythm, thus making your productivity decrease significantly, as well as making it near impossible to get up early during the rest of the week. In addition, it can cause health concerns, such as being overweight.
The solution is to try and stick to your regular routine on the weekends, even if you stay up later than usual.