Dr Jarvis in his book "Folk Medicine" recommends the use of honey and apple cider vinegar for those who have a hard time falling asleep at night. Mix one tablespoon of apple cider vinegar in one cup of honey and take two teaspoons of this mixture just before going to bed. Repeat after an hour if required. (You can sleep on that one!)
Some people find that simply taking one tablespoon of apple cider vinegar in 8 ounces of water just before bedtime, helps them to get to sleep quicker and sleep much longer.