Don't just link randomly. The FSIBlog3 SEO plugin (free, built-in) creates "thermal clusters." When writing a new post, link to 3-5 older "hot" posts. This circulates the "heat" (link equity) through your domain, telling Google that multiple pages are currently relevant.
I’m not sure what you mean by "post: fsiblog3 hot." Possible interpretations — I’ll pick the most likely: fsiblog3 hot
When working with fsiblog3 hot, you may encounter challenges such as: Don't just link randomly