Have you got a slow cooker? In the early days I found it a life saver, I dont think we would have eaten a cooked meal for the first few months without one lol

Clothes airers are also not really nursery items but would be handy in winter especially if you are using cloth

I second investing in a good wrap or sling

Not a big thing but a thermometer is really handy with little ones

The main things I use EVERY day are our close carrier, the cot and linen, change table, clothes, nappies, wipes and the car seat . We could survive without the rest