Setting realistic deadlines is crucial. Deadlines that are too short may come off as pushy and may not give your audience enough time to act. On the other hand, deadlines that are too long can dilute the sense of urgency. A good rule of thumb is to consider the nature of the offer and the typical behavior of your audience. For instance, a flash sale might only need a 24-hour deadline, while a more complex offer like a webinar registration might require a week.