They then list memories that fall under those categories- at least four to a box, and then afterwards, a star is placed next to the one memory in each box they would most like to write about.
For each day after, students begin the class by taking time to do a "zero draft" (no-risk) using one of the ideas from their list. Students share their zero drafts to elicit questions and comments written on stickies (we call them "writer's gold") which are placed on the draft for later use, should it be a piece the student chooses to take through the entire process.
Tech note: The last time I did this, students posted to our class blog. Peers responded online, oftentimes requesting the writer choose a topic from the list they were especially curious about. The only thing I felt made it worth doing online was the larger audience (thus more feedback) for each of the writers.