I can't believe I forgot these two ESSENTIAL items in my earlier post:
Swaddling blankets - all babies love being swaddled in the beginning, and if you end up with a colicky baby (prayers that you don't but be prepared for it after the first 2 weeks JIC) they are godsends. Get a real swaddling size - at least 40" by 40". My mom made great ones by cutting a queen size flat sheet in 1/4s and sewing simple hems around. But you can buy pretty ones, though they are expensive. Flannel (light flannel is good even for warm weather) is best because it grips. Again, don't think regular size baby blankets will work, too small to be effective.
Happiest Baby on the Block book - read it, watch DVD if you find it; learn how to properly swaddle your lo BEFORE they are born, practice on a doll or something. I don't agree with all the doc's theories but man oh man are his soothing techniques lifesavers. And book is so short and easy to read, and make sure hubby reads it too, and anyone else who will be there helping out on a regular basis.
In case you couldn't guess, my ds1 was colicky, and these things really really helped, but I didn't find out about them until a few weeks into the hell period. They won't get rid of the colic, but will help you soothe your child no matter what they are dealing with.
Also we found infant probiotics to be very essential to treating his gas and easing colic symptoms, not to mention cutting out dairy for me - and there is no food allergy history for either of us. This time my stocked freezer (another thing I found the hard way, because you will be starving with no time to cook - forget hot meals for a while, baby senses it
) will be full of non dairy slowcooker/oven friendly food for hubby to heat.
And last, in this way too long post
, check out the homebirth supply list. Long sticky in Homebirth forum, but has lots of tips for pp supplies, like honey and seaweed to help heal tears, frozen diapers for sore areas, etc.