Where can I learn best practices for sending mass email?

Ensuring that you're sending emails that aren't bouncing or being marked as spam are two critical metrics to keep track of when executing a mass email marketing campaign.  Even more important is making sure that you're following the guidelines that Amazon Simple Email Service (Amazon SES).

Here's a link to their Amazon Simple Email Service Email Sending Best Practices (PDF), which provides great information for you to use to increase your email campaign performance.