A few descrioptions to get you in the right mind=set.

• A Portfolio enables you to record your experiences and achievements relevant to graduate attributes. Reflecting on these experiences ...
• The notion of the portfolio is consistent with Boyer's (1990) concept of 'scholarship of teaching' in that it reflects a systematic, evidence-based, carefully thought-out approach to maintaining and improving the quality of student learning. http://en.wikipedia.org/wiki/EPortfolio

Look under 'My ePortfolios' to view a few samples of what you can do with an e-portfolio.