Stay organized, maintain inbox zero! (For outlook)
  1. Always answer meeting requests, it's yes or no, are you free or not. Bonus these messages disappear when you respond!
  2. Delete, delete, delete! Have you answered, is there anything else you need? No, then delete it. If it's for some long term project make a folder, then delete the whole folder when the project is done.
    I really don't understand people's fear of delete
  3. Before you are done for the day go through your sent items for the day, flag anything that you are eating for a response or follow-up on, these will now be in your task list.