I think that it would be rather handy to set up a system of deadlines and important tasks, such that each task had as a displacement activity something else constructive. I have vaguely got that arrangement here just now, but not quite, the displacement activity is useful (trying to learn enough of another language to make it useable in real life, and possibly enough of it to put it on a CV), but not actually immediately relevant to the things I have to do. Things like essays and dissertation preparation.
The other activities, like filing my notes with colour coded bulldog clips, or playing Minesweeper, these I have an every harder time justifying.
Writing Artymusings, well, that comes somewhere in between I think. I can, almost, convince myself that it’s relevant to my course, but really, I am displacing like mad here.