Cottage cheese cartons, whipped topping cartons, margarine tubs, go through dish washer well, re-use for leftovers, and things freeze well in them too. Plastic containers of various sizes, perfect for sack lunch.
Water bottles, fill 2/3 full of water, freeze tilted, (so not to cover opening when frozen, then add water to drink.
OR fill almost full, use as ice pack to keep lunch cold, then drink when thawed.
Newspapers work great for washing windows, polishes without streaking, but your hands will get rather "inky", but that washes off. Newspapers also work in garden to mulch tomato plants.
I make my own chicken or turkey broth, freeze either in plastic or glass jars.
Salsa or pickle relish, pasta jars with the rubber seal around the inside of the lid, I have reused same jars and actually canned new homemade salsa or relish in the same jars after washed in dishwasher and sterilized.
Panty hose, cut the legs off, work great for garden ties around plants and will stretch for ties for large objects as well. (I know there are some of you are wondering "who wears panty hose", ha ha).
Glass jars for craft projects, terrariums. Many areas have places to recycle glass.
Old tee shirts make great lint free dust rags.
Plastic grocery bags make great liners smaller trash cans.