Stop using the inbox as a to-do list: send each email to Google Tasks or Calendar the moment you read it
An inbox is a terrible place to keep a promise, and Gmail already ships the two buttons that move it somewhere better.
Android Police's Anu Joy stopped letting her inbox double as a task list and now splits every actionable message two ways from the message's three dot menu: Add to Tasks, or Create event. A task keeps a link back to the original email and appears in the Tasks side panel alongside Calendar, so the thing to do and the time to do it finally sit in one view, and you can drag a message straight into that panel instead. Her sorting rule is the whole system: if you need to check it off it goes in Tasks, and if you need to plan your day around it, it goes on the Calendar. One caution she raises is worth repeating, because Gmail fills a new event from the subject and body and adds the other people on the thread, so strip the invitees out when the reminder is only for you.
