My DD is six weeks so we're very much in survival mode! But she's starting to show some signs of a pattern, so to a certain extent she sets the routine. Though as PP have said, it can all go out the window – you can be all ready for the baby to sleep when they suddenly do an almighty poo and upset themselves. Or they're napping but have to be woken up to be weighed by the health visitor. Or it's growth spurt cluster feed day!
We started out just trying to set her circadian rhythms, so curtains open and lights on and normal voices and activities when DP's work alarm goes off at 6am; lights dimmed and whispers and no playing after 9pm; some outside time and fresh air each day, ideally.
So: Get up, grobag off and new nappy, outfit on. Then a "routine" of feeds and nappies and cuddles or screams (depends on the day) until she chooses to nap or I spot the tiredness signals or it's been 45-60 mins since she woke up. Sometimes we feed to sleep, sometimes we rock; EASY hasn't really worked - one eye on the clock so she doesn't get overtired is all that works for me.
First awake window I try to breastfeed her with the vitamin D drops. Second I stick her in the bouncer so I can shower. Then a long sling nap so I can do chores (wash all her stuff endlessly). Lunch happens, somehow? Early afternoon sling nap in which I try to leave the house and do something - coffee with antenatal class people, a walk, whatever. Late afternoon it generally all descends into cluster feeding/cranky overtired baby witching hour madness, DP comes home, and we tag team trying to calm her, feed ourselves, I feed her, etc. At some point around 9/10pm she generally conks out naturally and sleeps for 3 hours, so I do too. Three times a week we manage a bath.
Sometimes I read her a story as I feed her to sleep in the evenings but that's for my benefit! Plan to introduce a bedtime routine around 10-12 weeks or when it seems her pattern has stabilised. Just in time for the 4 month sleep regression!
Sorry for the essay my main conversation is with a tiny baby.