Say you offer acupuncture should you include an article about nutrition? Yes you can once, you have shared about acupuncture. I like to write mailing list something that talks about how acupuncture treats back pain and then talk what foods promote healthy muscles. 3) Offering discounts specials or other incentives to visit you. This is so over done that it's no wonder people leave lists including yours if you do this every time.
Your clients don't need to know your specials that often. Even a monthly special by email may be too much in some markets. The bottom line, specials don't bring people back you do with your customer service. Make it fun, and enjoyable to spend mailing list their money with you. Let's say you are a salon and you offer specials. Make them monthly at the minimum and send them out once a month with the other weeks being valued content.
It's better to send it once a month, talk about what the special is, and then give great content in the rest of your newsletter than to display it every week. Simply put a link to the special of the month on your website at the bottom of the weekly emails mailing list for the rest of the month. Don't have a specials page on your website? Then just a 1-2 sentence reminder at the bottom on the 'off' weeks that you have a monthly special. 4) Affiliate selling.