I get around 6 1/2 to 7 hours. I always aim for 9 but fail 99% of the time.
I find that to get to bed early I have to be uber-ruthles with my bed time: cut off conversations, stop work in mid flow, no time for flossing "sorry guys its my bed time."
I find that to get to bed early I have to be uber-ruthles with my bed time: cut off conversations, stop work in mid flow, no time for flossing "sorry guys its my bed time."