When you're looking for a way to improve your blog's usability, a breadcrumb is definitely an option to consider.
According to Wikipedia,
Breadcrumbs typically appear horizontally across the top of a webpage, usually below any title bars or headers. They provide links back to each previous page that the user navigated through in order to get to the current page, for hierarchical structures usually the parent pages of the current one. Breadcrumbs provide a trail for the user to follow back to the starting/entry point of a website. Generally, a greater than (>) is used as hierarchy separator, although other glyphs can be used to represent this.
There are many different solutions available in order to implement ...