Homework-wise, I usually have to turn all devices that can connect to the internet off, prepare an entire vat of coffee, and give myself some sort of incentive, e.g. "If I can master trigonometry after finishing all these set questions, I shall not struggle tomorrow!"
I know I've got to do the work, and it does get done eventually, just usually very late and in a hurry, before say, the lesson it's due.
Of course, that's school. I find things outside of academics far easier to bring myself to do.
...unless it's tidying my room.
...I'm not the most motivated of people.