There are a lot of Dos and Don’ts that any blogger may take into consideration while trying to build your own blog as a portfolio.
Rule of thumb:
The CONTENT (that keep the user revisiting your blog or site continuously) is more important than the container (the interesting and sophisticated widgets which give a good impression) which may woe your audience at first but may lost their interest when there’s nothing useful nor benefiting them. Here’s some resources that may give you a good ideas to start with:
Locke, Mike. (2013). Web design portfolio dos and don’ts.
What are the five pillars of quality online education?
You may read more by looking for the report published by the Sloan Consortium (2012):
Lorenzo, George & Moore, Janet C. (2012): The Sloan Consortium Report to the Nation: Five pillars of quality online education. http://onlinelearningconsortium.org/publications/books/pillarreport1.pdf.