Lay freshly picked blueberries out on a rimmed baking sheet to sort through them.
Remove any berries that are unripe, bruised, crushed, moldy, dirty, also leaves, stems and other debris.
Place clean sorted berries into a zip lock freezer bag, gallon or quart size.
Try to get as much air out of the bag as possible, this can be done by placing a straw in the mostly closed bag and sucking out the air while closing the bag.
Label the bag with the date and place in freezer.
Rinse or wash berries as you take them out of the freezer to use them in your favorite recipe.