i spend a day gathering it all up, do loads of strimming etc, then add a good load of straw and horse/sheep/pig/chicken manure, add paper, cardboard etc, i used to do layers of stuff but russ correctly pointed out it doesnt rot down as well so i mix it all up now. you can fill a heap one day, then keep adding as it sinks down. you dont want it too dry.so add water. i use sheep dagging stew!
i made about 1/4 ton this year like this.