Sometimes, we tighten our belts and get ready to finish off the unread pending emails in our inbox. Unfortunately, as of now, Gmail does not provide a straight simple way to list only unread emails to make our lives easier when we are on such missions. I hopes soon Gmail will provide an easy method to view unread emails.
For the time being, however, you can do the following:
In Gmail search box, type
is:unread to view only unread emails
is:read to view only read emails
is:starred to view only starred emails
is:chat to view only chat conversations
is:important to view only those emails that you have marked as important