Help with Critical Commentary

I would really appreciate some help on what to / what not to include in a critical commentary. I have been asked to submit one as part of my port folio for APEL, I have been asked to consider me as a Ward Manager and me as a Clinical nurse.

I'm not sure which is the best way to approach it - first I started off with headings and short statements of my role and achievements. Then I started padding it out and find it may be too long and I think I may be putting too much in as it is repeating other sections of the port folio.

It is one part of four module outcomes "criticaly think and anaylse through reflection" I am drawing on past events but I fear I may be making it too personal like a reflective diary and I'm not sure if this is what is required.

Many thanks in advance.

Jane