Send Appropriate Emails to 'Action' or ‘Awaiting Response’ As-Needed
As you're sorting, send emails to ‘Action’ or ‘Awaiting Response’ if they belong in those categories. Try to only send the most important here so you don't bog down that folder as well.
Feel free to add additional folders, like ‘receipts,’ as you see fit, but don't get caught up in this if you're needing to do a mass declutter.