The house has PVC piping in the kitchen and bathrooms. Polystyrene is terrible and I avoid it at all costs. At restaurants, if the only take-home option is styrofoam, I'll either leave without taking my food or, most often ask for foil to wrap it in and a plastic bag. I'll rinse and recycle the foil and re-use the bag for cleaning kitty litter.

Jeans! There are never-ending racks of jeans in every resale shop.

Not only important to avoid putting groceries in plastic/paper non-reusable bags, but don't put loose produce in plastic bags if it's not absolutely necessary.