Since you will be visiting the WDW as an off-site guest, I would suggest looking at the Extra Magic Hours for the days of your visit. Your first plan of attack should be to avoid the parks with morning or evening
Extra Magic Hours.
Extra Magic Hours are a perk for guests staying at a WDW resort. These parks tend to be busier with the guests that do not want to park hop to another park or due to guests staying to enjoy the extra hours.
Next, decide if you will be park hopping or practicing the one park per day method. You'll want to plan for at least 1 day at Animal Kingdom, 1 day Hollywood Studios and 2 days each at Epcot and Magic Kingdom. If time does not permit that allotment of time, then simply plan to see your Must See attraction and then move on to the next park immediately.
You'll also want to consider if you want time for a mid-day break, shopping at Downtown Disney or perhaps swimming at a water park.
Sift through those ideas and that should get you started with your planning!