To maximize space in a small room, consider using multifunctional furniture, such as a sofa bed or wall-mounted shelving. Use light colors to make the room feel more spacious and add mirrors to create the illusion of depth. Eliminate clutter and choose furniture that's appropriately scaled for the room's size to avoid overcrowding.

To achieve a cohesive design in your home, it's essential to maintain a consistent color palette, style, and theme throughout different rooms. You can use a unifying element, like a specific type of flooring, and repeat patterns, colors, or materials in various spaces. Professional interior designers can help you create a coherent design plan.