Your choice of furniture will largely be based on the activities that will take place in each room. Think about each activity and what pieces/storage/items it will need. How much space can you allow the furniture to take up and still allow enough room for movement and circulation?
When ordering furniture, check that it will fit through the access points in the house – measure both external doors and internal, staircases and hallways. There have been many occasions when a window had to be removed to allow a piece inside or a crane hired to lift furniture to a high floor.
Plan for plenty storage. It’s one of the most common complaints people have about their living spaces.