Resist picking blueberries that have just turned that tantalizing shade of blue - they need about a week more on the bush to develop fully.
Hold a container under a bunch of berries and rub your thumb over the cluster. The ripe berries will fall off; those not yet ready for picking will stay put.
Pick from a single cluster for up to a month - the berries ripen a few at a time.
Spread blueberries in a single layer on a shallow pan or plate, cover them with paper towels and then with plastic wrap. They'll keep for up to 5 days in the refrigerator.
Freeze blueberries in a single layer, then pack them into covered containers and put them back into the freezer, where they'll last for months.