Useful items or tips: Realtors often send their clients and customers calendars and recipes. People who receive these items will keep them because they offer something helpful or useful, and it keeps the Realtor's name in their mind because they're reminded of it each time the prospect refers to the calendar or recipe. You can do the same. Just make sure that what you send is something people would want to keep and fits with your business. 
Enhancing the Value of Mail: The Human Response, sponsored by the U.S. Post Office, used eye-movement tracking and biometric measurements such as heart rate and respiration to gauge attention and emotional engagement with both digital and direct mail. It then used magnetic resonance imaging to capture participants' brain activity when asked to recall a particular ad. http://1287170585.rsc.cdn77.org/wp-content/uploads/2016/11/3Stages_EmailMkt_Branding.png
All text is boring, but too many images, in relation to the amount of text in the email, can actually increase the likelihood your email will get picked up by a spam filter (spammers use this tactic, to hide spammy words from filters). In addition, images draw attention, but you do not want them to draw too much attention, away from important text.  You’ll be in good shape if you enter your text first, then sprinkle images where it’s appropriate.
A mailing list archive is a collection of past messages from one or more electronic mailing lists. Such archives often include searching and indexing functionality. Many archives are directly associated with the mailing list, but some organizations, such as Gmane, collect archives from multiple mailing lists hosted at different organizations; thus, one message sent to one popular mailing list may end up in many different archives. Gmane had over 9,000 mailing list archives as of 16 January 2007. Some popular free software programs for collecting mailing list archives are Hypermail, MHonArc, and FUDforum.
Push marketing is a proactive technique that enables e-marketers to "push" their product/service information to Web visitors or shoppers without their requesting it. Banner advertising, pop-up advertising, e-mail promotion, and spamming belong to push marketing. For instance, e-marketers can rent designated space from Internet service providers such as America Online or MSN for their banner or pop-up ads. Using animated graphics, appealing messages, and links, e-marketers try to lure visitors to their sites to buy their products or services. Many Internet users, however, find such ads annoying and employ software that blocks pop-ups and banner ads. <
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