Priority One: finish the bloody thesis!I always think it is so strange when people talk about having huge backlogs of books lying around, whenever I get a new one I start reading it immediately! Not saying it is wrong, just not my style.
Priority Two: there isn't one, everything else can be done after you get your degree.
So, now I have 5 years' worth of backlogs of books, out of which I've read about half a dozen in the last 5 years.