Sleeping bags (newborn size not 0-6 - so much easier than blankets)
Infacol
Perfect prep machine and steriliser if bottle feeding
White noise app and Bluetooth speaker (we gave up on Ollie the owl as our baby woke up as soon as the white noise stopped, whereas an app allows continuous play and doesn't need batteries)
Black and white picture books
Changing mat with deep ridge sides - much safer when they discover rolling (usually sold as over cot mats but you can unscrew those bits of using it on a worktop)
Feeding pillow - useful in early days of feeding and then as a support for when baby first sitting up
I also recommend the angelcare sensor pad monitors for later on - it provided the extra reassurance needed when transitioning baby to own room, and we havnt had any issues with it false alarming like some reviews say
Snoozeshade (for Pram) especially in summer (don't bother with Pram parasols - they're really awkward and fall off all the time)
Sleepyhead (not necessarily straight away as expensive if not needed - but quickly if you have the problem of baby waking up as soon as they are put down)
And to the PP who asked, yes we use sleepyhead over night, and have done since 3 months. We used it in the travel cot when she outgrew the Moses basket but was still in our room, and between us in bed if we were having a bad night (regularly) to make co-sleeping safer. She then transitioned with it into cot in her room at 6 months with no problems. Lullaby trust don't endorse anything, however the sleepyhead is tested for overnight sleeping, unlike many similar products. I certainly view it as safer than accidentally falling asleep with a very young baby as desperately sleep deprived, and if there's a next time around I wouldn't hesitate to use it sooner if needed.