A little procrastination can derail our train of thought and interrupt a spontaneous spur of productivity. This is not to say that we must drop everything whenever we get an idea but we should be weary of what procrastination really does to our productivity.
A job can be a stressful experience and it is not always one that we look forward to. This is especially true when we are not doing the jobs that we really want to do.
You may not always think about what affects your productivity but there are many factors that play a role in how productive you can be. Favourable working conditions allow you to get more done while unfavourable ones provide distractions and other obstacles to productivity.