Make sure you get as much info as you can on what will be discussed, what options may be proposed, and what is best for your daughter. I finished school last year for early education and this is something we discussed with a panel of parents, teachers, and others. One of the main things they said can go wrong is that the teachers, doctors, and parents, do not always have good information on what is being planned, and sometimes the parents are not well informed, feel intimidated, or don't think they have much say in the matter.
Try to find out ahead of time from the teacher or principle or someone who will be at the meeting, about what kind of proposals may be suggested. Do your homework and try to find out anything you can about you daughter's conditions, her typical behaviors and what options you feel are most important in accommodating her needs and bringing out her strengths. Ask any questions you can think of that seem important, and ask for clarification on anything you are not clear on.
They are there to help (those in the meeting) but they can seem intimidating, and they don't always keep everyone else's views in mind. Just make sure you speak up for your daughter. Even if you're nervous, or don't think they will listen, say whatever you need to, and make sure they listen to you and answer all of your questions. This is your daughter and if it's an IEP meeting it will likely have a big influence on what will happen in her life and education for at least the next several months when you have another IEP meeting, so you're going to want to make sure they get things right.
I hope that is helpful and not to wordy.
V.