"If passing through a room means walking around furniture, it's in the wrong place."
Your home shouldn't be an obstacle course. Make sure your furniture is arranged so you can easily enter and exit rooms without making sharp detours around tables, couches, chairs and ottomans. Easy-access rooms seem larger and help draw people into the space.
There's no other way to arrange your furniture? Perhaps you've crowded too much into the space--take some out! Is your furniture too big for the room? Replace oversized items with smaller pieces. Drop-leaf tables, for example, are a great idea for small dining rooms and dinettes.