It’s important to recognize that we (optimally) spend about 1/3 of the hours in a day in bed.  7-9 hours is optimal for most people.  Therefore, sleep must be an extremely important part of life that many people aren’t making time for.  Humans have a diurnal rhythm that controls our sleep-wake cycles; in short, we are creatures of habit.  For a great night’s sleep it is important to have good sleep hygiene.  Below is a link that I find valuable to help people who have difficulty falling asleep, and staying asleep by promoting healthy sleep hygiene.