You can reduce the number of emails in your inbox instantly, and keep it that way, by using filters. Filters can be told to check each email for a specific set of criteria, and then a specific action to do with it.
Here are five types of emails you should always filter:
Email Newsletters
The first thing you should do after confirming a subscription is filter these into a “ToRead” bucket.
Friends Forwarding Articles
If you filter based on sender and websites in the body of the email, it helps separate junk from real conversations.
Comment and Ping Notifications on a Blog
Filter these into a folder you can review each night.
Facebook/Twitter/Social Media Notifications
Filter all of these and check them at your convenience.
Store Promotions
Filter these into a “Review Optional” folder -- browse them at leisure if you have the time.