WordPress Call To Action is such an easy and thorough way to add CTAs to your blog, I’m genuinely surprised they don’t charge for it. The plugin allows you to customize the size, color, content, and location of your CTAs. You can start from scratch with one of their templates, or upload your own. Whatever you choose, there’s no coding required, just a good understanding of WordPress.

Most importantly, WordPress Call To Action allows you to monitor your conversion rates. You can set up A/B split testing (that is, two different calls to action that show up randomly for different visitors) to see which one works better. The plugin will track views and tell you how many people click on each version, so you can make your CTAs great.