Email Marketing

the theme and the message is the most important

Surprised no one has said this but segment your email list. I also started an email newsletter recently and have seen my clickthrough rate skyrocket when I segmented users.

Be sure to do A/B test with Subject Lines as well.

For blogs, the easiest starting point is probably a newsletter tied closely to what readers already visit for. Offer a useful checklist or mini-guide, then send your best new posts plus the occasional exclusive tip.

I'd keep the schedule consistent, but I wouldn't force emails when there's nothing worth saying. That usually feels more trustworthy than constant promotions.