A break back at the resort every day is a must. Even if your daughter doesn't always take an afternoon nap at home, she'll likely be far more active & stimulated, so a nap and some down time at the pool will help keep all you happier.
Obviously the Magic Kingdom will have the most rides she can go on (as PP said, anything without a height restriction) but don't count out the other parks. Also, be sure to check the times guide with your park map for all the various shows, street entertainment, etc. Most toddlers love these.
A character meal is a great way get some interaction without having to wait in long lines at the parks. Plus, your daughter can observe the characters from afar first, watch them interact with other children, and be prepared when they get to your table (or if she's scared of them, you'll be prepared to intercept them before they get too close). Call Dining at 407-WDW-DINE and see what's available, you don't want to just show up and try for a table, these meals are far too popular.
Bring your own stroller from home. You can rent strollers in the park, but they aren't inexpensive, and they're hard molded plastic. Your daughter will be far happier in the stroller she's used to from home. Plus you don't want to have to carry a heavy toddler to the bus and then to the room after a long day at the park.
Do some research, read ride descriptions, then form a list of a few "must do" and then "like to do" attractions for each park. Start at the top and work your way down, but be prepared to go with the flow. "Commando", non-stop touring just isn't possible with a child this young.
I'm sure you'll have a great time, it's so much fun to watch a young child at WDW, it's all so magical to them!
Have a great trip!