Now that blueberries are here, it's a good idea to freeze some for the winter months, when you need a jolt of summer. Commercially frozen blueberries are far less desirable than those you freeze yourself.
Here's how: Spread the berries on a jellyroll pan, sorting through them to discard stems, leaves and soft or spoiled berries. Freeze the berries just like that, exposed on the pan. As soon as they are frozen solid (which takes no more than two hours), put them into a plastic food bag, tie it airtight, then enclose that bag in another plastic bag, again tying it airtight.