Exercise is really the best form of stress relief that I have ever found.
Leave the phone at home go for a 5k run at your own pace or a goods 40 minute walk and it really does clear your head, but if you can build up a sweat for about 10 or 15 minutes you normally get a bit of an endorphin release in the brain and that feels good. For some reason the stuff that doesn't need to be stressed about just seems to float away.
Also set a time of the day when you can switch off, so you can say ok its 8.30 whatever hasn't been done yet will have to wait until Tomorrow because its my time now ( unless of course the kids a sick or something like that ) and then turn on your favourite show or chuck on some music , usually works for me.