For awhile I have known that I am efficient when it comes to email. I use Gmail, it offers methods to help with email management. Using filters to automatically label with a category, archive (remove from the inbox view), and mark emails as read, are all actions that can be performed based upon a condition.
For instance, if the email is from dailystoic.com, I can do this: Skip Inbox, Apply label “Daily Stoic”. Skipping the inbox archives the email, but doesn’t mark it as read. The “Daily Stoic” label helps when identifying it later on.