Today: Return lost items.
Explanation: The Talmud tells us that an item is only and truly “lost” when its owner despairs of its return. Your job is to not let that happen. Granted, this is one of those mitzvot which depends for its fulfillment on specific circumstances — but to a certain degree, don’t they all?
Exercise: If you find someone’s missing property, and there’s no identifying name or address, place it conspicuously near where you found it; the person it’s attached to may come looking for it. If this is not feasible, take it to your local police station.