Another recommendation - if possible, be flexible with what days you're going to do which parks, if possible. I have 13 days in the parks from December 2-15 - with it being before most people go on Christmas break, and so many days, you'd think I'd easily get everything I wanted, right? Not so!
I had to switch some days around that we planned to be at the parks and work around the
MVMCP dates a bit (we're doing 2 of these but MK has them about 4 times a week in December), but by doing so I've managed to get every ADR I wanted except a breakfast at Garden Grill (which seems to be due to Disney holding back these openings for the Candlelight Processional Dining Package). At first I was feeling hopeless because for the first week we're there I couldn't get anything at Ohana, Akershus, Biergarten, Coral Reef, etc. for any days or times we wanted. Unless you have hard-ticketed event tickets or your FP's already booked (I'm assuming your trip is in November so you wouldn't), your plans should be quite flexible this far out and you may be able to move which day you plan to do which park around a bit. By moving my tentative plans around, and trying to book more hard-to-get reservations towards the end of our trip, I was able to book everything I wanted - even a PPO breakfast at Akershus, and I had tons of time slots to pick from for Be Our Guest and Cinderella's Royal Table.
Keep checking as people release reservations all the time. Don't give up hope! With you having booked your trip this far out, it tends to be pretty rare for you to not be able to get at least 75% of what you want, even if it pops up at the last minute.