Reusables are possibly the easiest change a person can make at home. I'm pretty sure no one ever said, "I love driving by the landfill, I can't wait until it gets bigger." The truth is, I'm not sure people really think about landfills, unless they drive by one regularly. If this is the case, I'm sure it is easy to notice just how quickly they grow. This is not even to mention the really awful smell if you forget to turn the air in your car to internal before you pass by. So what can one person do against a literal mountain of trash? Find something you throw away most, and see if you can replace it with something you can reuse.
This was very easy for me at first, as I lived only on a university stipend when I had my first apartment to myself. The first thing to go: paper towels. Growing up at home, we always tore the paper towels in half to make a roll last. (This was before the new smaller ones existed.) While on my own, however, I decided it was pretty silly to use a paper towel to eat my pastry each morning. What on earth is wrong with using a plate and just rinsing it off? Plus, my dog was house trained and it was only her and me. There were not a lot of messes to be cleaned up.
This decision has been harder to maintain with a bigger house, bigger family, and bigger messes. But I am happy to say paper towels are still banned to this day. Messes are handled with newspaper, towels, and baking soda (which soaks up liquids like pee and turns solid so you can sweep it up and clean the surface). There are many other disposables to ditch too. Starting with plates, utensils, and napkins, and moving on to cotton balls, menstruation items, and diapers. Before you throw out the toilet paper, though, you might want to start with something a little easier to lose.