1. Determine what your  typical wake up time will be
2. Count back five 90 minute cycles or  7.5 hours
   • Each sleep cycle on average is 90 minutes long and the average person has  5 of them per night
3. Set your alarm clock or cell phone to tell you when to go to bed (but remember to reset it for your morning alarm)
4. If you wake up within 10 minutes of your morning alarm after three days of going to bed at your “bed time” you found your perfect bedtime!
5. If not, and you still need your morning alarm to wake up, then move your bedtime alarm back by 15 minutes every three days until you wake up just before your morning alarm.  When you wake up before your morning alarm, you have found your perfect bedtime.

Interesting sleep hack. Now, do this in a hammock and you're all set.

The conclusions of the 1998 paper by Andrew Wakefield and colleagues was renounced by 10 of its 13 authors and later retracted by the medical journal Lancet, where it was published. Still, the suggestion the MMR shot was connected to autism spooked parents worldwide and immunization rates for measles, mumps and rubella have never fully recovered.

...

But measles has surged since Wakefield's paper was published and there are sporadic outbreaks in Europe and the U.S. In 2008, measles was deemed endemic in England and Wales.

People need to know about the ongoing assault on public health, the sick kids, and the several deaths that resulted directly from this criminally irresponsible paper and from Lancet's publishing of it.

A public service announcement from LifeHacker.