When a prospect decides to become a customer, you want to welcome them with open arms. That is also true for a website user who signs up for your newsletter or other marketing material. In both cases, someone has made a commitment to your business based on what you've given them so far, and you have a fantastic opportunity to build on that positive feeling. In this article, I will share with you the best practices for writing effective welcome email series, as well as some ideas you can try out for your next campaign.