I can never have enough compost. The soil on my land packs pretty hard and when it rains the water has a difficult time soaking in and getting down to the roots of the plants - so I use compost everywhere.

The best things about compost is that it's free, it helps plants a lot, and it reduces your garbage stream.

Composting is so easy to do and if cared for properly it doesn't stink. Compost pretty much takes care of itself and the only things you really have to worry about is the moisture level and that you're not adding toxins to it.

1. Coffee Grounds and Filters
   I drink a lot of coffee so coffee grounds make up about 1/3 of my compost. No, that's not true. But it is true that coffee grounds and the filters (tea and the bags too) can be composted. Those hard working, always on the job worms might even thank you for it.
2. Paper Egg Cartons
   Some people might say that you'll be adding to much brown material to your compost (dry materials with no nutrient values) if you throw in your paper egg cartons. But if you're into composting you're probably going to know if the moisture level is too high or too low. While egg cartons don't add very much nutrients to the compost they can be used to absorb water in a compost that's too wet. Egg cartons will do pretty much the same thing as adding peat to your soil.
3. Paper Towel and Toilet Paper Tubes
   You can also use these as a replacement for those little peat pots that you can buy for starting plants if you're into that sort of thing but you're probably going to find yourself with way too many seedlings and not enough space in very short order. Just like the paper egg cartons, paper rolls can be composted.
4. Egg Shells
   Even though plants and trees don't have teeth or bones they still require calcium. Egg shells are a great source of calcium that can be safely added to your compost. Egg shells do take a long time to break down so it's likely that you're going to see some remnants in your compost. If seeing these remnants bothers you let the eggshells dry out and then crush them before adding them to your compost. Dave's Garden has a great article on how plants get and use calcium.
5. Drained Water from Vegetables or Pasta
   A lot of people overlook this resource and drain their boiled foods over the kitchen sink. You can use this to water your plants directly or dump it on your compost that's too dry from adding egg cartons and toilet paper rolls. YES - you can manipulate your compost and play an active part in the whole process. Make sure that if you've used a cooking oil when you're boiling it'd be best to put that water on your compost rather than give it to your plants.
6. Cut Flowers and Pruned Material from Houseplants
   When we started composting my wife went crazy about it. She wants her compost ready yesterday so she breaks everything up into little pieces to help speed up the process. I know, that when I buy her cut flowers she's looking at them and thinking how good they'll look in the compost rather than on the dining room table. Cut flowers, trimmings or dead leaves from your house plants are all good composting materials.
7. The Materials from Cleaning Your Aviary or Bird Cage
   After I've cleaned my birdcage I take all the materials, lining and all right over to the compost bin and work it into the pile a bit. I use newspaper to line the cage so it breaks down pretty fast. If you keep birds you can think of them as your little chickens producing chicken manure so you don't have to buy it.

Composting is natures way of recycling. It's so easy that anybody can compost and that everybody should.