Do you know the in’s and out’s of e-mail etiquette? This key arena is so important for writers; after all, so much these days is done online. For example, do you know how to send a “plain text” e-mail as opposed to a formatted one? What about crafting the perfect “subject” line? This could mean the difference between getting a query read and getting one deleted. Check out this top 20 list of etiquette tips and see how you measure up!