Let’s remember the two minute rule. Take the number of items you have in your inbox and multiply that number by 2. That’s the maximum number of minutes this project should take you. Then, set aside uninterrupted time to start working on your inbox.
This practice is actually a great way to help you get acclimated to the new way you will handle your inbox. If you have a very large amount of items, it may be useful to break this project into a few different time slots. BUT… Don’t stop the project until your inbox is totally clear!