I think there's something to be said for boredom and what it can lead to. I don't think that boredom itself is the problem - it's where your mind goes at the point of boredom that could be the cause for concern. I'm facing that issue right now - I'm trying to keep my mind off of certain things by keeping busy, but boredom with menial tasks seems to send it drifting again.

Sometimes I think stepping away from the computer and forcing myself outside (even in -45 C temperatures) is the best thing for me...