You also might wish to consider the ways in which you learn or like to take on large projects. Personally, I am a list maker. I like to have a map a plan if you will. When I'm working on a novel I do the same thing and it may get revised several times before the work is completed. When I was in my Master's program I had my system down so that I could wrote a 25 page paper on International Relations and associated topics in 3 days starting from research to final completion. To do that required caffeine, medication, and no sleep but it was what I had to do at the time to get the job done. You have to create a system, a habit, to do this. If you can find a reliable way of working rather than working ad hoc then you will be able to do more easily and tackle large projects in the future.