Here are some tips and ideas to enhance the living room setup:

Enhancements:

1. Add Throw Pillows and Blankets: Introduce a variety of throw pillows and blankets in different textures and subtle patterns to add comfort and visual interest.
2. Incorporate Metallic Accents: Small metallic accents, such as a gold or silver tray on the coffee table or metallic picture frames, can add a touch of elegance.
3. Use Layered Lighting: Besides the pendant light and the tall lamp, consider adding a floor lamp or table lamps to create layers of light and enhance the cozy ambiance during the evening.
4. Introduce More Greenery: Additional plants of various sizes can bring more life to the space. Consider placing smaller plants on the sideboard or on shelves.

Décor Recommendations:

1. Decorative Items for the Sideboard: Choose items like decorative bowls, vases, or a stack of stylish books. Candle holders or a small sculpture can also add charm.
2. Art and Wall Décor: If the abstract artwork above the sofa is a focal point, consider complementing it with smaller pieces on adjacent walls. A gallery wall with a mix of frames and art styles can create an eclectic look.
3. Textured Rug: While the checkered rug adds a nice pattern, consider a textured or layered rug to enhance the cozy feel. A sheepskin rug draped over the sofa or placed under the coffee table can add warmth.

Furniture Arrangement Advice:

1. Define the Space: Use the rug to anchor the seating area. Ensure that the front legs of the sofa and chairs (if any) are on the rug to create a cohesive look.
2. Create Conversation Areas: Arrange seating to encourage conversation. If space allows, add a couple of armchairs or a loveseat facing the sofa.
3. Balance the Room: Balance the room by placing furniture symmetrically around the focal point, whether it’s the artwork, a fireplace, or a TV.

These enhancements and recommendations can help elevate the cozy and inviting atmosphere of your living room while maintaining its neutral and serene aesthetic.