There is some debate over whether people need portfolios.
Some people think they are a waste of time others think they are vital.
I think having a portfolio is a good idea, so here is some advice on what to put in it. I even think electronic resumes are a good thing. When I seek writers to fill positions in my department, I always ask for resumes and three brief samples. It's also helpful to briefly explain the style and format of the document, and why they were chosen. Choose samples that show the depth and breadth of their work.