The document discusses 5 tools that should be used in email marketing campaigns: 1. An autoresponder service like Aweber, Getresponse, or MailChimp to automate email messaging. 2. Slik to drive more traffic to email signup forms by gathering emails from LinkedIn. 3. Leadfeeder for analytics on website visitors to gain more insight. 4. NewsletterBreeze to curate content and reduce time spent creating newsletters and email blasts. 5. Social media linked to email broadcasts for more exposure.