Is your beach house a little dated or needing a mini makeover? Here are 23 simple decorating ideas that will spruce up and highlight the beauty of your summer residence.1. Classic Adirondack chairs on the porch.2. Removable cushion covers and sofa slipcovers in outdoor-rated fabrics such as Sunbrella are easy to wash and will stand up to damp swimsuits and towels.3. Braided or woven area rug.