Now is also the time to invest in a reusable cups and containers. Many cities are introducing a disposable cup tax, which can add up quickly if you get coffee often. Single-use cups are hard to recycle due to the lining that keeps the liquid from seeping out, so most end up in the landfill. A bonus to a reusable mug is it keeps your hot drink warm for hours.
Having your own container can also come in handy at the dining halls. Some do not allow you to take food out of them, but if your dining hall does, try to pack up your extra food in some Tupperware. They might not let you do this, depending on health code, but it never hurts to ask if you can put the food in your reusable container to save for later.