eviebear everyone's different, of course, and we will all have our favourite stuff/stuff we could have done without, but in the spirit of chipping in..!
Things we couldn't have done without:
Sling - well, you guys already know my lentil-weaving credentials
Muslins - however you feed your babe they're blooming useful. And my Mum is still using hers for all sorts of stuff 38 years on - how's that for value for money!
Lansinoh lanolin - if you're planning to breastfeed, it's worth its weight in gold
A mobile that can be attached to crib/moses basket/whatever. It was the only way I could put DD down long enough to get a shower. We were lent a very over-educational black and white shapes one called, I think, an Infant-stim or some nonsense, but bugger me if DD wasn't totally enthralled by it.
Things that didn't work for us/didn't need:
Bouncy chair (see - there's always one!) - we were lent one and DD loathed it with a passion. Spent a total of 5 minutes in it, I think.
Baby bath - we just took her in the bath or shower with us. Might be different second time around though...
Scratch mits - never stayed on, although socks worked a lot better on hands than they did on feet.
changing station we didn't buy anything specific, but was glad to have a small square table we used to use for the computer available, as I do have a bad lower back and found changing on the floor quite painful. But as DD was a first child and we were in a tiny house, going upstairs to change a nappy was easy, and I did sometimes change her on the sofa if I couldn't be arsed to get up the vertiginous stairs
Lydia tried your Moby yet [sling fanatic emoticon here]?
Just got a very good outcome from the paypal resolution centre. Breaking news: arsey mis-selling ebayer gets comeuppance via the power of rational argument and irrefutable evidence shocker! [smug]