First of all, BuzzFeed has awesome subject lines and preview text. They are always short and punchy -- which fits in perfectly with the rest of BuzzFeed's content. I especially love how the preview text will accompany the subject line. For example, if the subject line is a question, the preview text is the answer. Or if the subject line is a command (like the one below), the preview text seems like the next logical thought right after it:

If you’ve been following along from the beginning, you have now learned how to grow your email list to epic proportions, you’ve segmented your list so that your emails are highly relevant to each individual subscriber, and you’ve learned how to send amazingly effective emails that have a high open-rate. Now you are ready to automate the process and turn your campaigns into money-making machines!
This relationship can take multiple forms. You may partner with a brand launching a specific product and receive a percentage of the revenue generated by your referrals. Or, if you work with websites like Amazon, you receive a percentage of whatever purchase a follower makes through your referral links, even if they don't buy the product you were specifically recommending.