At 8 days old we were in hospital and DS was tube fed, but that really helped as (1) I slept 10-6 and (2) he learnt day and night. We were breastfeeding, then EBM, then formula, then me pumping. He was tube-fed overnight for 2 nights.

I would suggest co-sleeping to help regulate bub's circadian rhythm, asking a friend to cook you a meal and forgetting the housework for a couple of days. Before the cord stump falls off you can't give a full bath, but you can have a bedtime music CD, bedtime story, lullaby, routine... it's very useful the older they get, you can see DS starting to wind down after dinner now.

Oh yes, I also right from the start had day in the sitting room, night in the bedroom for everything. When he awoke in the day I'd talk to him as he fed, played with him, kept him awake. At night we kept it quiet and dark so DS would feed back to sleep.