Progressing gradually...

I have been writing for at least 8hours now but only got 3 chapters of my book exam done! Still 15 chapters to go!! I blame my slow progress to my lack of concentration power. Although I still have 2 weeks to achieve to accomplish this task, but the days ahead are looking busy with more lecture preparation, project work and also to host the German visitor during KUAS international week.... so, I hope I could have better concentration when pressure is mounting, so that I could accomplish the rest of the chapters within target time! God, help me please, give me strength, persistency, will and power to accomplish this task! Thank you God!