Tons of muslins and bibs!
Ditch the bottle warmer they take bloody forever, use a jug filled with just boiled water and dunk bottle in that! Cold water to cool freshly made bottle. Making too far ahead not advised now though I did it with every baby I cared for and they're all still alive to my knowledge! I cooled bottles made ahead by popping in freezer for 15 mins initially. I'd say you need another 4 bottles for a newborn as they feed little and often.
Get a variety of teats as not every baby likes same shape/flow.
Only get one lot of formula just yet - again different babies different preferences plus allergies/irritants
Nasal sucker thingy
Changing table - i never bothered as 8 times out of 10 you won't be home or be downstairs where it's easier to do with a towel on sofa
For you:
Incontinence pants! They're more secure and gentler on tummy esp if you end up having c section.
Deo wipes
Warm comfy night wear (your temp drops dramatically as no longer containing body warmth of 2 people) bed socks and slippers! It's one of the reasons maternity wards are so warm.
Tissues - lots! For various leaks and uses
Cash (inc coins)
Cold/heat patches for any sore areas
Lavender and tea tree oil for bathing in to soothe and speed healing.
Bio oil I've heard great things about but can be pricey. Best thing I've found to prevent scar formation is Holland & Barrett aloe Vera gel (comes in a green tube).
If you're going to co sleep - mattress protector for YOUR bed 😉
And back to baby:
Clothes - gifts tend to be newborn or 0-3 size, I hardly needed to buy any for that stage for dd I was swimming in em! But 3-6 months on I needed to.
I always preferred pampers nappy wise and having taken care of quite a lot of babies before dd I grabbed them whenever they were on offer. Ditto wipes.
Also don't bother with baby bath pita and used ours once! Instead we used a frame thing which suckered to bottom of real bath and held dd up.
Like this:
www.amazon.co.uk/gp/aw/d/B00CMR3H04/ref=mp_s_a_1_2_a_it?ie=UTF8&qid=1493834192&sr=8-2&keywords=baby+bathing+seat&tag=mumsnetforum-21
There's loads of options along that line now :
www.amazon.co.uk/gp/aw/s/ref=is_s_ss_i_1_13/261-8350442-1173410?k=baby+bathing+seat&sprefix=baby+bathing+&tag=mumsnetforum-21
Have to confess I'm not a fan of perfect prep, seems expensive and faffy for as you say doing essentially same job as a kettle. I had a travel kettle and jug in bedroom once dd went onto ff. (I bf till she was around 8/9 months but then my milk dried).
Slings - I've used with some babies but not all like them. Dd didn't.
Those saying toys aren't really necessary at this age, it may seem they're not having much effect but different colours and shapes to look at and different textures to touch do help develop eye muscle strength and neural pathways. You only need a few and you'll probably be gifted a fair number too.
Yes! To hooded towels - dd was still loving using hers aged 5 or 6!
Stock up on your preferred laundry detergent, fabric softener, stain remover etc when they're on offer (have people keep an eye out for you if you tend to stick to one supermarket) also if you don't have a dryer get another main airer, over bath airer, radioator airers you're gonna need them (actually I did have a dryer and still needed them
).
Learn the roll DOWN technique and make sure your partner does too, with vests for poonamis!