I'm working on my third year in a photo-a-day photography project, and there are days when it's pretty near impossible to think of something to shoot. On days like that, you need an assignment - someone to give you a topic or subject, and you go hunting for (or staging) a photo to meet the assignment.
So, I cobbled together a simple web page to randomly generate assignments.
If nothing else, it might spark some ideas for you to create your own assignments.
If you use the utility, I'd love to hear about it! If you post to Flickr, throw a tag of "assignmentr" on the photo.