Tedious but necessary

It's going to be a fairly tough week. One of the team is on holiday so I have picked up all of the third line support for his app. Coincidentally one of my other apps seems to be especially active at the moment. Together these mean that I won't get any, what I consider, "real" work done this week.

It's a necessary part of the job but not especially interesting or rewarding. However, because of the stop-start nature of the work I have been reading up on my Websphere training. I am trying to decide if I should book a course (the expensive option) or continue to try and teach myself.

Any advice from people who have been in this position would be appreciated.