Most of us are also familiar with the old adage: Drink eight 8-ounce glasses of water daily. The eight-by-eight rule advises us to drink 64 ounces (approximately 1.9 liters) of water daily.

There are certainly cheaper days to fly, there aren't really cheaper days to book. "There's not much benefit to buying your tickets on a certain day of the week," according to the Google report.