Steve Jobs' commencement address
"So you have to trust that the dots will somehow connect in your future." Jobs said. It seems that we are always doing something useless, however, perhaps these things will matter someday. Just focus on what you are doing, and wait for returns with enough patience.
To do what you love, and to love what you do. Jobs encourages us to find some work we truely love, which is really hard for most poeple. Thus, it's not bad to find a work you kind of like and try to love it.