E-mail Marketing Suggestions

Hi We have been advertising, via e-mail, our 2-day practical WordPress training course for the past two years or so. See attached a typical mailer we have been sending out. We want to change the message and make it fresh and appealing so that we can attract more people. We require some advice or the rewriting of the mailer with punchy subject lines for A/B testing. We have used Subject lines such as: - WordPress Training Course | Special Offer | 50% OFF | Limited Seats - Are You in Control of Your Website? - Are You in Control of Your WordPress Website? - Build Your Website Without Knowing Howto Code We use phpList and Interspire to send e-mails. Sometime we compose the e-mail in ActiveCampaign or MailChimp for the HTML.