Two blankets, one for warmth, one for comfort.
A couple of outfits.
A car seat.

That was it. Anything else could wait until after she was born though TBH I can't for the life of me remember buying anything else. Oh, one thing, a high chair with wheels so that I could move her around more easily esp when trying to put DD2 to bed (only necessary as I have SPD and couldn't carry her for very long).