Find a relatively large empty space. Take your backpack, messenger bag, or whatever sort of bag you carry around with you regularly, empty all the contents out, and arrange them carefully so that they represent a visual snapshot of the stuff you tote around with you on a normal day. Then take a clear photo showing your bag and the stuff and upload it to your site.
Note that like the avatar or the literacy narrative, this too is a type of autobiographical composition. If you have something in your bag that is private, embarrassing, or for some other reason you don’t want it in the picture then make the editorial decision not to include it. Or vice versa: if you would like to assume a certain kind of persona then you might consider including items in your catalog that might be less than fully true.
Add some text to your post listing the items represented in your photo, preferably adding in a bit of explanatory and/or funny commentary along the way. This can be a paragraph of text or a list or whatever format seems most appropriate for you. When these sorts of posts are done by publications, like say The Verge or Timbuk2, they are often not so subtle efforts at product placement but for our purposes there is no reason for you to engage in such advertising games.
Along with the photo and your description of the items, include a paragraph reflecting on what it was like to craft a self-portrait through this photograph. How actually representative is this image of you as a person? What sorts of choices did you make in order to create the image? What was challenging about this assignment? Is representing yourself in a catalog of the stuff in your bag a type of writing? Why or why not?