The Irish Attic book has a subsection under each main section called Make Life Easier. These ideas are from that section under Carpet.
Use squares of old carpet to wash textured walls. A carpet square will get into all the crevices and won’t scratch your walls like a brush would. Use the carpet side, not the backing side.
Glue a piece of carpet to a scrap piece of wood to make a cat scratch post or use a piece of carpet to recover an existing cat scratch post.
Cut carpet into small pieces to place under the feet of heavy furniture or appliances. These carpet pads will make it easy to move the piece around as well as protect your floors.
Scrap pieces of carpet can be used to redecorate a doll house.
Line a pet bed with carpet.
Carpet in good condition can be glued to one or more walls in a child’s or teen’s bedroom. Not only does this add a decorative element, but more importantly it helps to deaden sound (especially helpful in a teen’s room!).
Carpet can be used as extra insulation in an attic, dog house, tree house, even your compost heap.
Place a large piece of carpet in your garage. You can use it to define an area and to make walking barefoot in your garage more pleasant.
Place a piece of carpet in the back of an enclosed truck or van to protect the bed from scratches and make it easier to slide large items across the bed. You can place it carpet side up or carpet side down, whichever you prefer.
Use scrap pieces of carpet as temporary car mats when doing messy activities like the beach or hiking.
Take scrap carpet pieces with you when camping to use as mats to keep the dirt or snow out of your vacation home.
Take larger pieces of carpet to line the inside of your tent for a more pleasant walking surface.
Place carpet in your garden to suppress weeds. Cover with fresh dirt or mulch.
Carpet placed under gravel or bark can be used to create a weed-free path or patio.
Cut a rectangle for a kneeling pad you can use when gardening.
Small pieces of carpet make a great scrubbing tool that you can throw away when it gets too yucky. These are great for cleaning a barbecue.