Time Management: how about SlimTimer?

This is a new resource to me, but if you're struggling with time management, then SlimTimer might help:-

http://slimtimer.com/

(Recommended by Barnaby Brown, one of our Scottish Music degree lecturers and now undertaking doctoral studies in Cambridge.)

Alternatively, you might consider the very simple Pomodoro technique, as described by The Thesis Whisperer.  It involves setting a timer, and sticking to it.  Read more here ...