Sam Kader - Thank you so much for your input. I agree with you about continuing contact with past clients. It helps you stay top-of-mind.
Marte Cliff - Sales "pitches" can be done in a soft manner. Adding a graphic with text and link is a super-easy way to sell without being salesy.
Kat Palmiotti - Frequency is dependent upon the length of your newsletter as well as the content. If you plan to create a lengthy newsletter, it should be sent less frequently. Content that makes your reader open your emails is the most important thing. See @MarteCliff
Monique Ting - Yes, yes, yes. After several years of email-only campaigns, people are getting back to the personal touch. Paper newsletters are expensive. So, I have started sending personal notes and cards to contacts. The point is to let your contacts know you're there, you can help them, and they matter.
Diana Dahlberg - Love your comment! Thank you.
Jan Green - I think the headline is the hardest part. It's something a lot of us struggle with.
Georgie Hunter R(S) 58089 - The frequency of emailing your newsletter depends upon your content. Time-sensitive items will need to be sent more often than evergreen ones.