The biggest refresh might cost nothing. A sofa turned toward a chair, rather than pressed flat against a wall, can change how a room works before a single new cushion comes home. When seating invites conversation and the path through the room stays clear, familiar furniture starts to feel useful again.
Good movement beats more stuff. Look at the route from the doorway to the sofa: if you have to sidestep a table or squeeze past a chair, the room may feel crowded even when it is not full. Pull seating into a loose group, with enough space to walk around it, and place a table within easy reach. Try it before shopping. You can always move everything back if the arrangement makes the room harder to use.
The details work harder when the layout makes sense. Warm wood and neutral colors already give the room a shared visual language, while layered textiles add softness and curated shelving gives the eye somewhere to settle. You do not need to replace those pieces; try shifting a throw to the chair you actually use, or leaving some breathing room between objects on a shelf. The result is not a showroom makeover. It is a room that makes better use of what you own. Would you move the sofa before buying something new?