For a newsletter submission, to ensure the email length is not too long, we have set a limit of 6 features which is the optimum length for students & increases click-through rates.
Try not to repeat features from one week to the next. Maybe try a different angle to entice a student if you need to. (ie. "Explore a new way to meet people").
Ensure anything featured in your newsletter begins at least 3days after the sending of the email, as it can take up to 2-3 days for students to open their emails.