You have decided that you want to spend time at The Magic Kingdom. This is the oldest park in WDW. It opened in 1971. Walt died in 1966 so he didn't see this park open. It was his brother Roy that took over and opened the park.
Magic Kingdom is designed a lot like Disneyland. It has the Hub that connects the lands. Instead of New Orleans Square it's Liberty Square. Instead of Toontown it's Storybook. It has also the same rides. Magic Kingdom is a large park and it does take some planing. Having a game plan is a great way to go to make the best time of your time. The best thing to do is to get there early. If you are staying at a Disney Resort you have a special perk and that is Magic Hours. Magic Hours are one hour before opening and 2 hours in the Evening. I, myself use those Magic Hours. Also if you are lucky to book a dining reservation to Cinderella Castle or the Crystal Place fro breakfast you can get into the park early. If you have a tour that starts before 8 am you can also go in early. I have done both breakfasts. The great thing is getting picture in front of the Castle with nobody in the way.
If you are not lucky to get a reservation, still go in early. The parts of the park that is open are Main Street, Tomorrowland and Fansteyland. The rest of the park open at Rope Drop.
One thing that you might want to do is get the map of the park and decide what you want to see. The one thing I do is go to the left and head to Pirates of the Caribbean or The Haunted Mansion. A lot of people like to go to the right and head to Star Tours or Space Mountain. A lot of the big rides have Fast Pass.
There are a lot Characters to see. The places to see them are though out the park. Mickey is on Main Street. Minnie, Daisy, Donald, and Goofy are in Storybook. The Princesses are at Princess Fairytale Hall. Others are listed in the Park Guide.
Photo Pass Photographers are all over the park, Many are with big characters and at photo places. The best picture to get taken is in front of Cinderella Castle. Get many photos take with different poses.
Photographers will also take pictures with your camera too.
There are a lot of places to grab a bite to eat. The places that I like to eat at Be Our Guest restaurant, for lunch, Columbia House, and Pecos Bill's Cafe These places are Counter Service places.
Remember to take it easy and don't rush. Also take short breaks. Go and get something to eat. Sit down somewhere and watch what is going on. See a show. Don't over do it.
If you are tired and need to take a short nap is The Hall of Presidents. This show is 20 minutes and the seat are very comfortable.