You can also voice opinions that repel people you don’t want to work with. For example, I’ve shared that I don’t like working with people who don’t take responsibility for their own life. If someone’s more likely to blame outside factors for their misfortunes than look for things they could do to change the situation, I won’t have a good time working with them.
Emails triggered by milestones, like anniversaries and birthdays, are fun to get -- who doesn't like to celebrate a special occasion? The beauty of anniversary emails, in particular, is that they don't require subscribers to input any extra data, and they can work for a variety of senders. Plus, the timeframe can be modified based on the business model.
The transition email – Remember, every potential customer is currently using something else to do what your product could do for them, and the act of switching from that process to using your product is a barrier you need to overcome. This email should focus on outlining a simple and easy process for making the switch from their existing solution to using your product to solve their problem.