An Effective Post

Different blogs have different purposes.  There are blogs for informing and blogs that are supposed to create discussion.  5 Good Resources for Learning the Periodic Table is an effective post for an informational blog.  Informational blog posts should be chunked into sections  and/or have headings.  When you are reading blog posts you're not expecting a dissertation.  Discussion blog posts are meant to provoke discussion and therefore need to be longer and have questions or opinions to discuss.