Give up disposable items
Most of us choose disposable items instead of reusable alternatives because we are trying to save money in the short run. Unfortunately, we actually end up wasting a lot of money in the long run. So, try replacing all your simple use items with durable alternatives. Start small with an electric shaver instead of replaceable razors and move up to more sophisticated devices such as reusable coffee filters or a continuous feed system for your printer instead of classic cartridges.