I haven't read the other posts so sorry if there are any repeats.
Things went pretty good with our older son who was 2.7 years when our 2nd boys was born. The hardest part, actually, was because I broke my foot during the last week of the pregnancy, and later, the older one was diagnosed with high functioning autism. It went surprisingly well otherwise, though.
My biggest suggestions are to buy a gift for your older child and have it be a present from the baby. Second, prepare food ahead of time a freeze! There are some pretty good cook books that you can interlibrary loan through your library. One is called Don't Panic, Dinners in the Freezer, and a second called Don't Panic, More Dinners in the Freezer (or something like that). We bought a chest freezer partially for this purpose.
Also, do what you can to get the older one to take his nap when the baby is sleeping so you can nap. Also, get a co-sleeper or just co-sleep with the new baby so you can sleep as much as you can at night. (I organize a playgroup, and you'd be surprised at how many of us co-slept at some point).
I don't mean to assume, but based on your screen name, and the fact that you are home birthing, I'm guessing you are going to breastfeed. That is the one thing I found that made it hardest with the second baby. I of course do not discourage breastfeeding (my 2nd went until 18 months), but it takes a lot of your time, so find ways to entertain your older daughter when you are nursing.
I also would sometimes tell the baby that he had to wait because I was with his brother. This made the older one feel important. So does having the older one help you with the baby. Have him fetch a diaper, or get you a kleenex, etc.
Also, take as much help as you can get!
Anyway, congrats on your pregnancy, and good luck with your home birth! I had both of mine at home too, but we didn't have the older one at the second birth. I just knew that he wouldn't handle it well; he has a lot of anxiety, and I needed to focus on myself.
btw, how do you like Westchester? We are planning on moving in the next couple of years, and Westchester is one of the first places we looked before we bought the current house.