You always find small space in your Gmail Account,this article defines you, how to deal with it.

• Open side bar where it shows you different  labels ,e.g. “Inbox”, “Chats” etc.
• Open custom labels and press “Create Label”  if you are not seeing this properly please, try expanding the menu. Create labels for those, who email you  regularly.
• Now go to Filters & Block Address option and create new Filter there.
• Add required information and type the name of that person you made a label for Email Address.
• In the option “Does Not Have” write the word Chat there.
• Press search button to check the authentication of email address.
• Click on this option: “Create filter with this search
• Check the box with the option of “Skip the Inbox”
• Click on “Apply label” and choose a corresponding name to email address.
• Check the option  “also apply filter to <number> conversations below
• ” Press ” Create Filter”
• Repeat the same process for all labels.