http://thedailyphd.com/# - A useful site that aggregates a lot of news and information about PhDs, the PhD process and related issues.

patthomson.wordpress.com - A nice simple explanation of how to come up with (and not come up with) research questions for a thesis. Distilled from Trowler's book (available cheaply at http://www.amazon.co.uk/Doctoral-Research-Higher-Education-ebook/dp/B007W57J5K )

www.palgrave.com - Provides help for those wanting to develop strategies for effective supervision with a diversity of students on a wide variety of research projects, whether at postgraduate or undergraduate level. Fully updated second edition includes new...

thesiswhisperer.com - A bunch of motivational tips by Alex Hope, with some useful advice for those struggling with the doctoral learning journey. Tip 10 (ignore tips 1-9) is particularly valuable: the take-home message is that every doctorate (or other large activity in...

www.timeshighereducation.co.uk - Great article from the Times Higher Ed giving hints and tips on how not to write a PhD. Good stuff.

cgi.stanford.edu - This is a useful article via Tomorrow's Professor for postgraduate students choosing their supervisory team, with a carefully thought-through set of criteria that includes expertise, accessibility, timeliness of feedback, previous success,...