How does one compost?

The subtleties of the English language appear to be lost on you.  Do you wish to learn how you yourself would compost, or how to make compost out of your yard wastes. 

In reality it does not matter which you had in mind, as both processes are essentially the same.  However, it is not recommended to compost animal products for household use (reference needed, find one on Google, you can search from this page :)) <-- That is suppose to be a smiley at the end of a parenthetical comment, not a double chin smiley.

Composting works by letting worms and microbes and black magic (think Harry Potter and his evil devil worshiping friends) do their things and break down organic material into smaller pieces which can then be recycled by other plants.  After these other plants have used the material one of two things can occur.  Either the plant will die and then can be composted, or an animal will eat the plant, then die and be composted.  The second option is not preferred however, as mentioned in the missing reference above, clearly then it is better to eat animals then vegetables.

To start your own compost pile throw a bunch of organic crap (leaves, grass clippings, Lima beans) in a pile on the ground.  Every so often 'stir' the pile to ensure that oxygen can get  throughout the pile to allow the microbes to "do their thing."  After a couple of months the microbes will be done, and you will have what farmers call "brown gold."  At least I like to think that is what they would call it.