This nice “you’ve been gone” email reminder from Dropbox is a smart attempt to reach out to on-the-fence folks (I signed up a few months ago but haven’t used the product in a while).

At most companies, there’s plenty of emphasis on acquiring new customers — but that means you can easily wind up overlooking folks who signed up for your product but still aren’t 100% on board yet. An email like this offers a good reminder: A customer retained is worth just as much as a customer acquired.