This is the strategy that most bloggers start with when looking to monetize their blog. However, keep in mind you're not limited to selling banner ad spots (which is generally an ineffective strategy these days). Consider other areas you could rent out: space on your pop-up box, social media headers, the "P.S." on your email newsletters...think outside the box (quite literally).
Think of new article topic ideas. I have a long list of over 100 possible article topics that I keep on my laptop as well as on my phone. I think of the many, many topics that you'll find on Making Sense of Cents through life experiences, reader questions, research and articles that I've come across (like if I see a crazy statistic that I find interesting, I'll then turn it into a long article), and so on.