There's always some leftovers or scraps that come out of the kitchen. This should never be put in the trash. It all acts as a food to something else, whether pigs, rabbits, fish, worms, BSF or even your compost pile.
The waste you'll inevitably get from butchering an animal is an invaluable additive to other animals' diet. It can be composted, but why do so when it is so nutritious as a feed.
If you have manure on your property, sooner or later there will be flies. They are one of the most irritating insects (besides mosquitoes) if you let them have their way. There are however many ways to control, and even use, them.
If you are building your bathroom from scratch, you can easily install a solar air vent from the toilet to the outside. The sun will do the work of an extractor fan.
Human manure composts just as well as animal manure. It is a valuable commodity, not something to be flushed away with clean water.
Making your own composting toilet is easy, elegant and requires no plumbing. You can design it however you like, so long as it remains practical.
Everyone has old tires that are no longer viable for a vehicle, but don't throw them away. They can still serve the homestead well.
As the price of metals has increased, so too has the value of metal junk. You can sell any old metal, but it is often more efficient if you can use it yourself.
If you can either prevent something from going into a landfill, or go and physically take something out of one, you are helping to reduce the enormous problem that waste has become.