A few weeks ago I asked if things were worth doing if your only reason for doing them was that you were afraid of not doing anything. I haven't really answered the question, but apparently I'm not the only one dealing with it:
The old man looked as if he had noticed the sudden stop and understood it; but he did not start discussing it; he said, instead, "I don't like what's happened to people, Miss Taggart."
"I don't know. But I've watched them here for twenty years and I've seen the change. They used to rush through here, and it was wonderful to watch, it was the hurry of men who knew where they were going and were eager to get there. Now they're just hurrying because they are afraid. It's not a purpose that drives them, it's fear. They're not going anywhere, they're escaping. And I don't think they know what it is that they want to escape."
- from Atlas Shrugged by Ayn Rand, page 65.