There are many ways to reuse and repurpose various items. One example is Ziploc bags. I see many people using Ziploc bags for packed lunches and snacks and then throwing them away. This can easily be avoided - if you wash your Ziploc bag after use and let it dry, it's perfectly fine to use it again. An alternative to this is using Tupperware for traveling food. Another example is getting a reusable water bottle. Reusable water bottles save money in the long run and have a manageable price range. Another thing you can do is donate old clothes rather than throwing them out and thrift new clothes when possible.