What happens next?

How to decorate a long wall or hallway
Create a focal point on the long wall.
If you have a room that has long walls paired with shorter walls, creating a narrow space, it's best to create your focal point for the room on the long wall. If you try to place it on the narrower wall, the room will look even bigger than it already does.
A focal point can be an entertainment center or it can be a large piece like a painting. Basically, it's what the attention is focused on in your space.