First, allow me to set the scene. My daughter is 13.5 months old and awful in every facet of sleep--will not nap except in a moving car, fights night-time sleep--often requiring a long drive before she settles enough to sleep, wakes up for feedings 3-4 times a night, and gets up early in the mornings to boot. Often grumpy and fussy, probably due to sleep deprivation. I know its making me grumpy.
I've tried so many things--baths, unvariable routine, music, patting, trying hard to make sure she gets enough food during the day, rocking, getting my husband to attempt to soothe her, etc., etc. ad nauseum. But nothing seemed to help.
Well, last weekend was crazy and my daughter got to bed muuuch later than her typical 7-7:30. But I noticed that she seemed to go down much easier than normally. She didn't scream or fuss, just babbled a bit and drifted off. So I thought I would try turning the parenting books' advice about early bedtimes on its head and move her bedtime back an hour.
It may be too ealry to trumpet success, but for two night's running my girl has gone to sleep with little fuss. AND....last night she only woke up for a feeding one time. She slept 8:30 to 2:00, and then until 6:00. I am in heaven.
So, if you've tried everything else, maybe try moving the bedtime later and see if it helps.