^^^ This ^^^
I have several small timers in my place and I use them to turn seemingly impossible tasks into do-able small chunks.
When my place gets a little sloppy, I set a timer for 5 minutes in each room, and then go around to each section of my apt. and clean up just for those 5 minutes. Then I might go around again for a second sweep. Using a timer is one of the best things I've ever discovered, because it adds a sense of structure, which is what I need.
For a written project, break it into tiny tasks.
1) Clear off desk. Go do something else.
2) Place paper, pencils, pens, notebooks, textbooks into position on desk. Go do something else.
3) Read reference materials to get an initial exposure. Go DSE.
4) Read again and then start writing for 10 or 15 minutes. Go DDS.
You get the idea. Not only are you getting the task done in small, manageable chunks, you are also training yourself to realize that these task which seem overwhelming are actually do-able by you.
Works for me. I've come a long way using these techniques. For me, the whole idea is creating structure where there is none.