I posted as recently as two weeks ago complaining about my lovely ds's horrifying sleep.
He has been, all things considered, a crap sleeper- and I've no doubt we've some crap nights to come.
BUT I just wanted to offer some hope to others with babies who are 'sleep challenged'.
DS has just turned one, and for the past week he has slept through the night. Actually slept through, from 7pm til 5.30 at the earliest, and 7.30am at the (amazing) latest.
Things that may have helped are wrapping him up warmer (thanks mn for that tip!), and cutting out the early morning feed after which he used to go back to sleep. He doesn't get any milk now til he is up and about. We also did a bit of controlled crying a while ago to sort out his bedtimes. And we started leaving him for a few minutes if he woke in the night (unless properly upset). To my surprise he self-settled more often than not.
Who knows which, if any, of things helped. But I know I have scanned this board many a time in desperation, hoping to read actual evidence that it really does pass. And it does! Even if this magical spell ends, I cannot tell you how restorative a full week of sleep has been 
Really hope this isn't smug. Believe me I have 'done my time' 