Choose a larger base rug
Place a smaller accent rug on top
Keep the base rug neutral if the top rug is patterned
Mix textures for contrast
Match at least one color between rugs
Center the top rug over the base rug
Leave an even border of the base rug visible
Use a rug pad under the bottom rug
Make sure both rugs lie flat
Align the rugs with the furniture layout
Keep patterns balanced, not competing
Use layering to define zones in open spaces
Try different shapes for visual interest
Avoid overcrowding the floor with too many layers