I try not to be too invasive, yet pretty aggressive with my opt-in forms. When you visit my homepage, the first thing you’ll see is attention grabbing and curiosity generating copy with a very prominent opt-in form above the fold.
When they are on the blog, I have an attention grabbing opt-in form on the right-side. Sometimes I use call-to-actions for my newsletter within my posts.
Using an exit-intent popup has also been proven to be effective and this is the most invasive method I use. I…