If you have to find devices to coax yourself to stay focused on writing, perhaps you should not be writing what you're writing. And if this lack of motivation is a constant problem, perhaps writing is not your forte. I mean, what is the problem? If writing bores you, that is pretty fatal. If that is not the case, but you find that it is hard going and it just doesn't flow, well, what did you expect? It is work; art is work.
Ursula K. Le GuinThe explorer who will not come back or send back his ships to tell his tale is not an explorer, only an adventurer; and his sons are born in exile.
Ursula K. Le GuinThere was a wall. It did not look important. It was built of uncut rocks roughly mortared. An adult could look right over it, and even a child could climb it. Where it crossed the roadway, instead of having a gate it degenerated into mere geometry, a line, an idea of boundary. But the idea was real. It was important. For seven generations there had been nothing in the world more important than that wall. Like all walls it was ambiguous, two-faced. What was inside it and what was outside it depended upon which side of it you were on.
Ursula K. Le GuinHardly anybody ever writes anything nice about introverts. Extroverts rule. This is rather odd when you realise that about nineteen writers out of twenty are introverts. We are been taught to be ashamed of not being 'outgoing'. But a writer's job is ingoing.
Ursula K. Le GuinScience fiction is not predictive; it is descriptive.... Prediction is the business of prophets, clairvoyants, and futurologists. It is not the business of novelists. A novelist's business is lying.... Open your eyes; listen, listen. That is what the novelists say. But they don't tell you what you will see and hear. All they can tell you is what they have seen and heard, in their time in this world, a third of it spent in sleep and dreaming, another third of it spent in telling lies.
Ursula K. Le Guin