I headed over to the passport office when we were done.
(I was nervous we wouldn't make it there on time, since our ceremony took so long.)
You don't need an appointment; you just need to be there before 4:30 (if I remember correctly).
You need an ID and your Naturalization Cert. That's all, oh - and some of the fees must be paid w/ a check. So have your checkbook handy or buy money orders before hand. Depending on the amount of people, you should be out in about 45 min. Many of your fellow Oath takers will be there also. I think there are more people there on Fridays, 'cause its payday too, just like at MVD on Fridays.
They will make you a copy of your cert for .50, if you want one. I kept a copy.
It's only a couple of blocks away from the courthouse, where the oath is. Parking is free at the PP office. Courthouse is at Washington/4th Ave and Passport office is at Jackson and 5th Ave - SW corner.
Also, just a thought, they may decide to change things around, but when you get in line
You don't want to be the first one in there. It's better to be more like towards the end.
They began passing out certificates on the left side, first row. That side was filled in after the right side, which were the first people in line.
You'll be one of the first ones to get out and complete your SS and Voting paperwork.
Also, have your oath paper completely filled out when you get to the oath - You have to turn it in as you go in the door. Sign it and use the Oath date.
SS gave us each a pen (after we were seated), but it doesn't hurt to have your own pen, just in case you don't get one, to fill out your paperwork. I would also print out the SS application at home, and take it w/ me to the oath, less paperwork to fill out there.
I think that's it. Enjoy!