Planning a move requires multiple steps. Among the strategies I have learned to employ are annotations and photographs that capture the items and note whether they are to be moved, given away, or discarded:
Combining this with an annotated plan for the existing home, indicating the plan for handling items makes the move go much more smoothly. (The movers can also use it to see what is being moved or staying behind.) This type of planning is especially important in downsizing, when some items are being left behind for later disposition:
Finally, augmented by 3D modeling, a floor plan and interior views give a sense of the scale of the new home and the proposed furniture layout.