The Method mix solid materials together with plenty of straw, cardboard or paper. Put a lid on top. Lots of people try, and fail to make good compost. The usual complaint is that it just sits there in a damp soggy smelly mess. The reason for this is quite simple, there is not enough air inside the heap for the aerobic bacteria to survive.
Air exists only in the spaces between the various components in the heap.
Soft materials like grass clippings and kitchen wastes quickly collapse and clog the air spaces. You can improve matters by adding coarse fibrous materials which help keep an open texture and provide more air spaces. Straw is the best material of this sort, and its cheap. For serious composters it is a very good idea to buy a bale of straw and keep it by the compost heap, putting on a layer a few inches thick every time anything else is added. Another alternative is scrunched up paper or cardboard.