Group your posts into series.
Just copy the post_series.rb file into your plugin folder and you're all set.
Add a series key to the frontmatter of your posts
---
title: "Foobar"
layout: post
series: my-very-special-series
---
Bla
It does not matter what value you use, as long as it is the same on every post of the series.
You can add a block with links to other posts in this series by using the Liquid tag:
{% post_series %}
