Procrastination

I haven't fully fleshed this out yet, but I'd like to propose a model of procrastination. Suppose my enjoyment of a particular activity can vary with time. An activity may be ardous today, but there might be some point in the future where I actually find this task enjoyable. Utility can be maximized, i.e. it is rational, to put off what I am not in the mood for right now with the expectation that it will become more enjoyable in the near future.

Obviously, self deception is a danger here. Perhaps the task I am putting off will never be enjoyable to me.