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).
In-depth tutorials are great for getting links and social shares. However, they can also be a great way to earn money on your blog. There are a number of ways you can make this happen - include affiliate links for the products you use in your tutorial; promote your own products in the tutorial; write a tutorial to promote an advertiser's product (just be clear that it's a sponsored post), etc.