There are many ways to decorate a beach home. There is a warm tropical vibe, red/white/blue nautical vibe, woody/earthy vibe, clean, crisp white vibe, etc. You can go literal with your decor or you can use subtle textures and colors that note the beach or coast.
I personally like the subtle hints and not so much the in your face "beachy" themes.
Here is a way to decorate a beach home in the nautical style. While I wouldn't consider this example subtle by any means, it still isn't seashells, and anchors all over the place.
All photos were taken from my Pinterest boards, here and here.