Wie muss eine Fünf-Sterne Betreffzeile aussehen?

Let's face it: Every inbox in the world is cluttered. From automatic emails from social networks flying in every time you're followed, Liked, pinned, or shared, to company newsletters, to the one-off email from your mother reminding you about an upcoming holiday ... your email's probably feeling pretty full right about now.

Some technology has tried to solve this problem -- apps like Mailbox and layouts like Gmail's inbox tabs have dominated the news over the past year. Some overwhelmed email users take to obsessively filtering and filing email messages on their own. Some just abandon email addresses and start fresh to avoid the deluge of email.