Discuss the context of the piece, the artist, history, album (is it part of a larger work?), etc. Cite sources as you find this information.
Include In-Depth Form Analysis with a visual aid of some sort (for instance a chart showing the form). Does it follow typical form? Talk about the characteristics of each section, compare and contrast, what makes the piece unique or so special to you?
What musical functions (there could be several) does this piece serve for you?