We should not be surprised by apparent interruptions to our schedule. C.S. Lewis said:
The great thing, if one can, is to stop regarding all the unpleasant things as interruptions of one’s “own,” or “real” life. The truth is of course that what one calls the interruptions are precisely one’s real life–the life God is sending one day by day; what one calls one’s “real life” is a phantom of one’s own imagination. This at least is what I see at moments of insight: but it’s hard to remember it all the time.
The Quotable Lewis (Wheaton: Tyndale House Publishers, 1989), 335.
Check out David Allen and Merlin Mann on this topic: 43folders.