1- What kind of map will it be?
An island.
2- What is the audiance?
Children's books. Round, cute and symbols as the main language.
3- What exists in this map?
Complete city with all sort of resources: buildings, schools, entertainment, services... Self suficient island.
4- First Step?
Draw the island limits, place the main buildings. Start from large to small. Big to detail.
5- Is it done?
Don't draw details or finished buildings untill you know for sure where to place EVERYTHING.
This map had at least 25 modifications and changes.