One more I'd add: Pick a time after which you will not check your email.
For me it's 10pm. Too many times I'd be winding down the day, getting ready for sleep, and decided (more like, was subconsciously compelled) to check my email one last time. Every so often, some nagging issue would come up that, in hindsight, definitely could have waited till the next morning, but once I started thinking about it, there was no way I could rest until it was resolved. This obviously cut into my sleep time (not good for the long term) and also often left me in an agitated state that made it harder to get good sleep.
Maybe it's 6pm, maybe it's 2am, but I recommend drawing the line somewhere, so that you can preserve the quality of your downtime.
I've also found that turning off all push notifications of emails to my phone helps me ignore emails until I actually get to them. I pick a few times per day to go through them in batches and immediately take care of anything I can do quickly, and star or archive the rest, depending on whether I need to follow up or not. I do my last check at about 9pm.
For me it's 10pm. Too many times I'd be winding down the day, getting ready for sleep, and decided (more like, was subconsciously compelled) to check my email one last time. Every so often, some nagging issue would come up that, in hindsight, definitely could have waited till the next morning, but once I started thinking about it, there was no way I could rest until it was resolved. This obviously cut into my sleep time (not good for the long term) and also often left me in an agitated state that made it harder to get good sleep.
Maybe it's 6pm, maybe it's 2am, but I recommend drawing the line somewhere, so that you can preserve the quality of your downtime.