I too have a problem with getting sidetracked, but I don't view it as a problem like some people seem to do.

Too many of my friends have a 'linear' stack of books, videogames, or stories that they want to complete, one-by-one, in order. I have great difficulty imagining any process less productive than that, as I am many times more productive when I am focusing on what interests me rather than what I feel obliged to do.