Here are the ten most important tips to ensure you're able to get the maximum return on your investment in permission-based email marketing.

1. Only send emails to persons who have requested them.

2. Only include content relevant to the type of content the person has requested.

3. Be consistent with your sending frequency. Pick a schedule, whether it is weekly, bi-weekly, or monthly and as often as you can stick to that schedule.

4. In most cases it is best to send business to business emails Tuesday through Thursday. We