Momentum
You cannot quit, you cannot give up, you need that momentum to break free.
When a rocket is flying out towards the moon to escape the atmosphere it doesn't pause half-way up the sky does it?
You are the only person who can make this work but you are also the only person who can fuck this up.
I got the most work done when I just swung my sword.
When I didn't even think about what I had to do in 3 hours, when I just swung my sword and kept on walking forward.
You might think it requires an immense amount of discipline but I promise you it does not. All it takes is for one night where you are a little bit more tired than usual and you have to get something done if you have a goal in mind I promise you, you will just go, move on to the next task. That is when I am the most productive, when I am too tired and drained to think about this giant monster of work I have in front of me, all I know is, if I don't swing my sword I WILL DIE. When I plan it out meticulously I get crushed every time.
After a few occurrences of this, you will start to realize how it works, that you just need to go, go, go.
I finished working on a task for a side project today then realized I was hungry, I was not hungry while I was working, I finished eating than realized I need to go to the gym, I did not think about going to the gym while working or eating, I finished at the gym and had to help a friend with something, I did not think about this while doing any of the previous activities.
By turning on the blinders and focusing on the task at hand, you will produce a higher quality of work as well as feeling satisfied when you go to sleep at night.
Give it a try.