Admittedly, it's really quite boring for any audience a writer might have, but sometimes, for many and varied reasons, it becomes necessary to disengage briefly from a project and just leave it alone. Regular visitors may have noticed that this is what I'm doing right now. Don't worry, I'll be back again next week.
Please note, though, that doing nothing is only an option for those who have made an early start. I know well (oh, so well) that it is tempting for students to procrastinate until the night before a deadline and then panic. At best, writing under those conditions is uncomfortable. Sometimes we suspect that the lecture or seminar dealing with the topic of our assignment will clear the mists sufficiently for work to begin, so we wait until then. In my experience, this is usually a misguided assumption. We lose valuable thinking and research time while we wait for someone else to come along and solve our problems, and that isn't what university is all about. Of course seminars and lectures are helpful, but there's no getting away from the fact that they are most helpful to those who have also done their own active reading. Especially after the first year of undergraduate study.
The take-home message from this post: get an early start, at least in thinking. It's much more comfortable, gives you a fair chance of sorting out any difficulties you might encounter, grants you extra editing time, and, don't forget, lets you do nothing for a while if you need to.