What is the purpose of your portfolio?
Who is the audience? (Has to be a real audience that has some meaning.)
What format will you use? Provide at least two examples that will you use as models.
What tools will you use/need to learn? Not just for developing the portfolio, but for the kind of writing you want to work on - ie, writing a blog.
What do you plan to include? Identify revision pieces and new pieces and why you are including each one.
For each area make sure to talk about how you made your decisions. Provide references for resources you consulted.
How do the pieces you chose connect to your purpose? Or how will these pieces help you reach your purpose?
What do you think you should work on for each piece of writing? (revision or editing, or both)