Hello again! I'm always happy to see you here.
The truly great thing about a compost heap is that you can safely add so many things to it! And the things you add to it are generally things that you might normally have thrown away with your household and lawn "trash". Your compost pile will be a miniature recycling center right in your very own yard! BUT...
....not everything can be tossed into your compost pile. Let's start with things that
can go into the heap. Something Lois and I do everyday without even thinking is to put kitchen waste into the compost heap. Starting with the brewed morning coffee, the first thing that can go to the pile is the paper coffee filter and the used coffee grounds. (Tea bags, too.) The finished ground coffee and the paper filters disappear quickly in the pile. In the course of the day, a variety of scraps, such as stale bread, orange and banana peels, apple and potato skins, or the ends of carrots all go to the heap. And, don't forget that bag of onions or potatoes that you pull out from the pantry, only to find they've gone bad. Out to the heap with them once they're sliced up! In the event of bad weather, the same things can go into a small container we keep just outside the kitchen door to be taken to the pile another time.
As you can see, some of the coffee grounds missed their intended target!
For convenience, if you don't have a door leading directly out of the kitchen (I'm thinking apartments, etc.) there are many decorative "kitchen compost buckets" which allow you to store some of your waste until it's convenient to get it outdoors. (The price range for these indoor composters runs from under $20 to upwards of a $100.) If you go this route, follow the directions to insure you don't raise a real "stink" inside your home.
You can also add paper towels and the cardboard tubes, shredded or torn junk mail paper and envelopes (I avoid "glossy" paper due to the inks), plain cardboard cartons - but not "frozen food" and other similar glossy cartons - the gloss on many of these is actually a type of plastic. Newspaper can be placed in the compost heap, but if you receive a daily paper and the Sunday paper, you will be tossing in as much as 10 pounds of paper weekly, which will overwhelm your pile very quickly. I've also read that putting newspaper in the normal recycling stream is of more value than putting it in the garden.
Most of the things coming from your kitchen work well for the compost heap. Things to avoid putting in the pile would be dairy products, raw or cooked meats and fish , as well as vegetables or other dishes with sauces. These foods will attract troublesome wild animals - dogs, cats, skunks, raccoons, opossums and so on, as well as provide a breeding ground for house flies. (I hate maggots!)
Outside the kitchen, your garden area will provide plenty of material for your pile. Lawn clippings* and leaves will be the most common. But, you will also have a healthy supply of plant waste as the seasons come and go. The caution here is to avoid putting any diseased plant waste in your heap. You can also put woody material from fallen tree branches and your pruning work. The key to adding these materials is to chop or cut them into small pieces to accelerate the composting process. Smaller items become compost much more quickly than larger items. A good pair of garden hand shears is a great investment!
Other items that can go into the heap include: wood ash in moderation (ash is acidic), sawdust and wood chips, egg shells (pulverized - I rinse them to remove the remains of clear albumen, let them dry, and crush them with a rolling pin. They're a great source of calcium. I put a tablespoon of ground egg shells in each hole dug for a tomato plant to help avoid blossom end rot.)
Easter egg shells with natural dyes are a good source of garden calcium
Other items to avoid in your garden compost heap: chemicals, medicines, manufactured products that do not biodegrade such as plastic, rubber, coal ash, etc.. I also avoid manure and urine of any sort whether animal or human. I just don't think the risk of contracting salmonella is worth the trouble. And, of course, there's the odor problem that your neighbors might find unpleasant. There are plenty of folks advocating the use of animal & human manure and human urine. You can look it up if you're interested.
*Lawn clippings - I say this with some reservation. Green stuff supplies nitrogen to the compost heap. The problem is that when material with lots of nitrogen rots it can become quite smelly as it breaks down and compacts. Grass clippings are fine when mixed in with the rest of the heap. However, if you're in a situation when it's been rainy and the lawn hasn't been mowed for two weeks, the sheer quantity of "clippings" may overwhelm the composting space which can cause an odor problem. Trust me...I know.
I hope you stop back in a few days!