There are a few options
Break it up
Numerical. This is when all the posts in the series have the same title but are numbered i.e. part 1, part 2, etc. I have done this on niche traffic sale [this blog] and some of my other blogs. But there is a better way.
Unique titles. This method is excellent for optimizing for a bunch of long tail keywords. Each blog post in the series should have a title that is unique to it and competes for a different long tail keyword phrase from other posts in the series. Because you are going after long tail keyword phrases, there is less competition and the chances of each post doing well and therefore getting search engine traffic, is much higher
To achieve this, you could use white space, bullets and subheadings.
Subheadings are particularly important again because of the all important SEO. Subheadings have emphasis on them. They are areas where the search engine spiders expect your important themes to be.