Today I covered most of my front yard in Pine Needles rescued from a friends house that needs a bi-annual clean up, resulting in 25 large garbage bags full...bliss! The remainder goes into the compost pile which at this stage is 5 ft high and hot as Hades, the pine needles will break down faster this way. Another option is to leave them in the bag after moistening them. Leave aside for 2 years behind a garden shed or whatever. In 2 years you will end up with a wonderful complex substance known as leaf mold that will (when dusted onto your soil) add millions of very beneficial microbes to your soil.