Blankets for everything. Wrapping them up in the buggy, when in the car seat. They may not like sleeping bags. For swaddling. (Don't waste money on a swaddle cloth).
I have been thinking of baby books. My general advice is read all of them but remember the ones with routines really only work for FF babies. MOST bf babies take a lot longer to sleep through the night and have a set routine. The one book I found useful and has no routines is Lucy Atkins 'First Time Parent'. She also has a book called 'Blooming Birth' or something that is good. She writes in a sensible practical tone. A lot of the others (Baby Whisperer/Gina Ford) are far too prescriptive and you can feel like a failure if your baby is not 'having a kick on the playmat at 8:05 am'.
We are actually quite a routine-y family so this is what worked for us and gave us a semblance of sanity. It comes from my MIL who pointed out that subsequent kids slot in easier into routines because the first one already has one. So instead of creating one that I wanted the baby to fit into, she advised me to do two things. First, after say the first 6 weeks jot down the baby's schedule for 10-12 days. You will see a rough pattern. And then try and follow that (rather than following the one in a book). So I noticed that DS was always sleepy about 90 mins after waking up so that became Nap 1 etc.
The next thing she said was do 4-5 things for YOURSELF at the same time everyday. So say wake up at 7 am (even if it is a bad night), hand baby to other parent and have some toast and tea, take a shower and get baby into clean clothes for the day (even if he/she throws up on it 15 mins later). Then she insisted I have lunch at roughly the same time even if it meant leaving the baby to grizzle for 10 mins. Then at 3 pm-ish she would throw me out for a walk. And we ended up doing a nice 2 hour walk everyday with a feed in the middle. And soon actually we had a rhythm to the day- waking up roughly at the same time, a sort of morning nap, then a feed, then some awake time, feed, more sleep, down some lunch and nap with baby, wake up and feed, go for walk etc. The timings weren't hard and fast and there were off days but by roughly creating a realistic schedule I felt much less out of control.
Sleep routine. Aha. So DS was tiny (which is why I am having growth scans) and fed every two hours day and night and wasn't the greatest sleeper. But we persevered with a 'night routine' which we STILL have (modified of course) 5 years later. We started, again on the advice of my MIL (who is wise but bonkers) at 2-3 weeks. Again roughly speaking about half an hour after the last feed post 6 pm (somedays at 6:30, some days at 7) we would dim the lights and do a massage. DS loved this. Then we would take him to the bathroom and put him in a warm bath for a minute or two. Keeping all talking to a minimum. Bring back to dim bedroom. Change into nightclothes. Feed while reading the same bloody book every night (Goodnight Moon in our case) and when asleep put down.
NOW here is the key bit. After this point, usually about 7/7:30 DS would wake a lot (sometimes 20 mins later) but we never ever brought him out. I fed him in the dark and changed in the dark. This was a bit soul destroying because sometimes we were stuck in the bedroom for ages (as per SIDS guidelines) but actually within a couple of weeks DS knew night from day. So yes he would wake up to feed 4-5 times but each time would go back to sleep. And actually having the same routine (we now have bath, teeth, stories and bed- no massage but dim lighting and not too much chatter) meant that he really got used to it before he developed any real opinions on the matter. So while he wasn't the greatest sleeper to begin with we didn't have a huge battle about bedtime per se because it was part of the normal rhythmn of the day. So if all goes well this time, then this is the one thing I want to replicate this time.