If ebooks aren't your jam, create tools instead. I don't recommend a one-or-the-other approach, necessarily, but if you have more development talent than writing talent, this may be a more attractive option for you. These tools can be valuable enough to some of your website visitors that they'll trade you their email address for a free demo of the product you built. Then, for your first email, ask them what they thought of the tool. It's the perfect icebreaker.
Sample review: “After using it (Sortd), you’ll be hard-pressed to imagine this tool isn’t going places. Create custom columns, such as ‘To-do,’ ‘Follow Up,’ or ‘FYI’ — the possibilities are nearly endless. Then, when an email comes in, simply drag it to the appropriate column. You can even set reminders, add notes, or change the title of the email. You can also set individual emails to “snooze” so that they are relegated to the bottom of your list until the snooze is over, at which point it pops back up at the top.” — B2B PR Sense Blog
A tracking pixel is a snippet of code that allows you to track your subscribers’ activity across various channels like your website, landing pages, and newsletters. Then, you also have the option to send emails triggered by certain behaviors. So for example, if a subscriber goes to your site and checks out your product page, a tracking pixel can send an email with a special offer for the specific product the viewed.