This email from Amazon Local is short and sweet, with just one CTA: click through this email to tell Amazon what you like and dislike. That way, the deals they send you going forward can be more in line with what you're likely to actually want. What's wonderful about this experience is not just that they asked, but also how consistent the experience is from email to landing page.
Notice how the language in the email above, "like" and "dislike," mirrors the language in the buttons below? This is a simple way to get feedback from your email recipients to provide more personalized offers in their inbox, thus increasing the chance of a high click through and offer redemption rate