Every Monday, Hermes checks my favorite coffee brand’s website and grocery stores for sales. When it finds a deal worth knowing about, it emails me so I can stock up. Step-by-step: 1. Hermes checks my favorite coffee brand’s website every Monday. 2. It checks grocery stores for sales on the same day. 3. When it finds a worthwhile deal, it emails me. 4. I use the alert to decide when to stock up.