Some Chocolate
But seriously....other than a few more NB covers (I have about 8 in rotation at the moment) I think you are fine. But some small suggestions I could add are...
A couple of snappies if you are using pre-folds (unlike mwah who only has one atm and is always losing it)
Microfleece liners, I have about 60 that a beautiful friend made me that I can't live without (well I can but it makes me sad to see poo all over unlined nappies LOL)
Some small bamboo boosters wouldn't be a bad idea either, my little man is a super wee'r and we are finding that he can almost out wee anything that is un-boosted atm :O
Other than that, really anything that takes your fancy
I have gone a bit crazy with longies purchases of late and beautiful items of clothing to show off. It is so cold atm I can't show off my nappies without turning my baby into an icicle
You will work out exactly what you will need when baby comes anyway
x Mel