Well, once your guest post is accepted on a site, you’ll often have the chance to create something known as an ‘author bio.’ In this section, you can mention that you have some complementary content available. This is often known as a ‘content upgrade.’ If the content you’re giving away is highly related to the blog post, you’re going to increase the odds of conversion rates being high.
Do you have an older list that you suspect has mostly decayed? Create an engaging opt-in message and send it to your old list encouraging contacts who wish to re-opt-in -- promising to remove all contacts who don't respond. Though it might seem counterintuitive to remove folks from your email lists in order to grow them, emailing only engaged contacts could improve your deliverability and increase the odds of your email getting shared with those outside your current contacts database.
For instance, Geoff points out popups as potentially distracting elements on a website. He recommends their use on e-commerce sites, but less so on SaaS sites. He says, “You won’t see any pop-ups on our website. While we may miss out on some emails as a result, my argument is [that] this benefits our brand [and] our credibility, and keeps the bounce rate of our site visitors down.”
It’s extremely affordable (starting at $15/month), while incredibly powerful and easy to use. I also find that GetResponse have some of the best newsletter template designs around. Aweber is another good call, but I find their user interface a bit outdated and clunky (plus, their pricing starts at $19/month – not a big deal, but considering they’re not quite as good as GetResponse IMO this pushes the needle in favour of GetResponse even more).
For effective and actionable results, you should do A/B tests, which test two (or more) different approaches. For example, you could send half of your list one subject line, and an alternate subject line to the other half. You could also A/B test the two approaches with a small subset of your list, then send the winning headline to the rest of the list.