When do you write? Are you an early bird or a night owl? Do you have a day job and have to fit your writing in around your hours at the office or factory?
We are all different. I can only tell you what I do.
I find I am brighter and more creative in the daytime so I speed write new stuff during the day, usually for blocks of an hour at a time.
In the evenings I am more tired and so not given to original thought. But this I find is the best time for revising previously written texts.
Unfortunately I have yet to find a comfortable way of using my laptop when lying in bed!