Lets break it down:
Refuse – Avoid single use plastics and paper products by saying no thank you, opting for reusables.
Reduce – Downsize what you purchase, opting to be more mindful of what you really need.
Reuse – Always find a way to keep an item out of the landfill by keeping it in great condition, repairing or upcycling it when it breaks.
Rot – Set up a compost system for your food scraps, or find a food scrap drop off center (like a farmers market, or community garden) near your house.