lay them out on a newspaper for a few hours stirring them around every once in awhile. Then, after they are totally dry to the point where there is not enough moisture for mold to grow go ahead and stick them in a coffee can or other air tight container and put in the freezer until your ready to extract. I would suggest drying it until its crispy as this way you can be sure once its ground up you expose all the available trichs for extracting using whatever method you prefer.