Begging the question arguments can be circular arguments as well. For example: Eighteen-year-olds have the right to vote because it's legal for them to vote. This argument is circular because it goes right back to the beginning: Eighteen-year-olds have the right to vote because it's legal.
I know one thing that's helped me is being able to work on my own time. I'm able to work when I feel I am the most awake or I feel I can focus better. I'm able to follow a schedule that works for me.