One of the great things about blogs is the ability to go back and look at what you have written previously. I happened to stumble upon a series work blog posts I made back in 2010. What often surprises me is that I had some useful thoughts that are still relevant to my work today and that I should not forget them.
That thought then took me back to one of the findings of my e-portfolio research. What struck me in interviews with students who had really successfully used e-portfolios, was the value of looking back at your thoughts over time. Here is a link to my original slides about the idea.
Having just done this myself, I too found it a powerful learning experience. When asked to explain the value of keeping thoughts and reflections it is this process of going back over time that really adds value to reflective writing.