Where to start with a portfolio?

I am not sure where to start with a portfolio. I have had many different duties this semester with CEC TV and am wondering where I should begin.
I have been in charge of directing, technical directing, running replay, engineering, scoreboard and camera operating. Should I do a section of all the different duties I have had? Starting with replay because that is the first thing I learned? I was thinking of putting together a clip list of some of the best replays that I gathered, then some of my best camera switching when I was directing and technical directing. Those three things are what I have been focusing on the most for my project so I think that would be the most fitting.
Do I need anything else with the clips though? Any ideas on what I should be doing? Any suggestions? I will gladly take all the help I can get. Until then, I will be watching film and gathering clips!