Ideally, we could spend hours a day, every day, writing. We could pore over our ideas, dedicating a large percentage of our mental energy toward perfecting every detail, both in large and small scales. Realistically, the world is not very ideal.
Life has a nasty habit of getting in the way of us doing what we'd like. Hours get lost, sucked away toward all of our other obligations. We just can't get as much writing done as we ought to. But, we can still get some done.
Write something. Make it three paragraphs if that's all you can manage. A dab will do you. Consider it symbolic if you'd like. It is an offering to say that you care, that even though you are not getting as much done as you'd like, you are still putting forth an effort because you care.
If you can muster up the energy to at least create a symbol of your dedication, it just might be enough to get you one more paragraph than you thought you were going to do. And that's a slippery slope toward getting all the writing done that you wanted to do in the first place.