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 GuinI went to the springs while the sun was still up, and sitting on a rocky outcrop above the cave mouth I watched the light grow reddish across the misty pools, and listened to the troubled voice of the water. After a while I moved farther up the hill, where I could hear birds singing near and far in the silence of the trees. The presence of the trees was very strong...The big oaks stood so many, so massive in their other life, in their deep, rooted silence: the awe of them came on me, the religion.
Ursula K. Le GuinA child free from the guilt of ownership and the burden of economic competition will grow up with the will to do what needs doing and the capacity for joy in doing it. It is useless work that darkens the heart. The delight of the nursing mother, of the scholar, of the successful hunter, of the good cook, of the skilful maker, of anyone doing needed work and doing it well, - this durable joy is perhaps the deepest source of human affection and of sociality as a whole.
Ursula K. Le Guin