Within an article-oriented page (such as a blog post), the element (level 1 heading) is commonly used to markup either:
As a screen reader user the heading level doesn't matter as long as it's consistent. Different blogs use different conventions, so there is no standard way to make it more accessible. Making sure the headings match to the content level is more important then what level of heading is used. For example if displaying a series of blog posts with comments all the blog posts could have heading level 2 and at the start of the comments you could have heading level 3. For an example of easy to navigate headings find any Wikipedia article with multiple sections and subsections. I can easily skip around main sections by using my screen readers navigate by heading feature to jump to any level 2 heading, and if I want to move to subsections of a given sections I will navigate to the next heading.