One of the easiest ways to gain insight into your blog and improve it is to track your internal search results. You can easily do this using Google Analytics (learn how to track this), or use this cool wordpress plugin. It’s very important to identify your top searched keywords - it helps you identify what’s popular with your visitors (write more content relating to these), and also, just as importantly, what visitors are failing to find on your blog (look for keyword searches that have zero results and create a post about them - as long as you can make it relevant to your blog). The more relevant internal search results the user finds, then the more chances of them signing up to your feed and coming back for more!