Creating effective and honest subject lines involves a few key practices. First, make sure your subject line accurately reflects the content of your email. If you’re offering a discount, mention the specific discount in the subject line rather than using vague terms like “Huge Sale.” Second, keep your subject lines short and to the point. A good rule of thumb is to keep it under 50 characters. Third, use actionable language that tells the recipient what they can expect or what you want them to do. Lastly, avoid using all caps or excessive punctuation, as these can come across as spammy.