Speaking vs. writing

I spoke at length with a friend about the problems I am having finding time to write. He pointed out that I am taking far too many speaking engagements. Since these tend to be in the south of Germany (because they assess tuition fees of 500 € or so a semester, so they have money for stuff like this), I end up with a good 5 hours travel there, an overnight, 5 hours travel home + the speaking engagement. That's more than I full day I could be writing,

And my theory that I can write on the train is really fiction. First train this evening had no electricity for my laptop - so I dozed, being very tired. The second one had electricity, but an annoying guy sitting next to me, so I chose to doze some more. So I kind of think he's right. Less speaking engagements. More writing — because the writing gets itself archived in libraries.