My list assumes birthing vaginally and exclusively ecologically nursing (no artificial bottle nipples or pacis) planned:
Stocked freezer with meals
Stocked household with groceries and household supplies and newborn essentials (clothes, blankets, diapers, wipes, burp rags, etc. These are more obvious.)
Umbilical stump stuff (cotton balls, Q-tips, rubbing alcohol by your changing station) Some opt not to clean them, but I've seen an infected one on a friends' baby, and therefore will be using alcohol again!
Nursing Bras (Ha...I don't think I have any regular ones anymore!)
Numbers of a LLL leader and/or friend/relative who have nursed
Bleach (to clean sitz bath between uses)
Hydrogen peroxide (to get blood out of clothing, etc)
Witch Hazel and Tucks Pads for cleansing down there
Maximum flow/overnight maxi pads for the first week postpartum, then lighter flow pads and pantiliners for after that. Remember, no tampons, as the placenta wound is an internal "open" wound!
Ibuprofen for reducing swelling
Ice, ice, ice for making packs for any sore areas!
Ziploc bags to make icepacks. Then wrap in a clean kitchen towel.
Prep.-H or Tucks or similar cream. I don't know of anyone who doesn't get "roids" from pushing out a baby. Anyone who says they didn't...LIARS!)
Stool softener caplets, milk of mag, or something more natural like prunes, prune juice, dried apricots, raisin bran, bran muffins, etc.
Underpads or chuck pads
Bag of DEPENDS or similar adult diaper...yes, hopefully not needed for incontinence but easier to have on hand...also great instead of dealing with pads and leaks. Even with a C-section, one can have problems with incontinence for a few days after delivery. See here.
Waterproof mattress pad...put this on your bed at about 36 weeks if you don't already have one in case your water breaks in bed! (like mine did with Claire!) Also, you really need two for each bed if you have kids ;) Saves mattresses!
A sling for babywearing
A bed rail for safe bedsharing
What am I forgetting???