I'm back on track with this, having scored 90% on my first TMA. Actually I was just a tiny bit disappointed I didn't score higher, but given my current level of enthusiasm for the OU work (i.e. none) I suppose I should be satisfied, because I've put very little effort into this module to date.
One difficulty I have, is that having worked in the software industry for a long time, I tend to look at the computing modules I study from a certain perspective, and to me, the material I've covered (so far) on this particular module has been so far detached from reality that I wonder what possible relevance it has. I do try to put aside my own opinions when doing the TMA's and just do exactly what is being asked for, reminding myself that it's the mark that matters, but it's not easy to do that.