Toilet paper

A bidet attachment installs on your existing toilet and dramatically reduces toilet paper use — by up to 80%. The average American uses about 100 rolls per year ($60-120/yr). A bidet attachment pays for itself within months.

If a bidet isn't for you, switch to toilet paper made from recycled paper or bamboo (like Who Gives a Crap). It comes wrapped in paper instead of plastic and is better for forests.