As part of a new lifestyle experiment, I've tweaked my router to block my laptop from all net access after 8pm.
The idea isn't to put a total ban on all nocturnal net activity, but rather to make a space for other things in my life. I'll still be available for scheduled calls and such, of course, but no unplanned activity.
I'll know if it works if I deng about less online, and become more focused in my evenings. I'll give the experiment a couple of months at least.