I sew after I've sent my kid to bed.
Then I put on a pot of tea, turn on my classical music, and sew.
Before I know it, 3 hours have passed and I have to crash or I won't be up in the morning.
Perhaps, shutting the computer down, and setting aside a certain time to sew would work. When you know you have 2 uninterrupted hours, things can happen.
Perhaps if you need to get up often, use that as an excuse to iron, when you need a change - do some cutting, then when you need to change, sew again. :::>????