When it comes to space planning and arranging furniture in your living room, you have various ways to do it. Besides the practical aspect (what sofa length, how many armchairs, seating configuration etc), you have to get the aestshetics right, too. Think about proportion, what styles go well together and the overall colour scheme.
Here are some ideas.
Design: Cube Associate Design
Design: Space Matters
Design: Box.ID Studio
Design: Viterbo Interior Design Asia
Design: Free Space Intent
Design: Minimo & Minomology
Design: E&A Interiors
Design: M3 Studio
Design: Sponge
Design: Space Factor