I like to keep my computer 'clean' so that when a colleague comes over and asks me to look at some problem the browser auto-complete/suggest does not suggest any non-work things, whether they be news sites, social network sites or anything else that I read in my own time. The most embarrassing things my auto-complete suggests are things like the man page for 'strpos' (I should know whether the needle comes before the haystack by now).
If I really feel the urge to read non-work stuff then I have my phone, which costs money, has a useless keyboard and a diminutive screen. If I am making a cup of tea then there is plenty of time there to see if anyone has sent me email etc.
Regarding work email, I do not read a lot of it and I expect my colleagues to know that I don't read emails. I do read important ones but social events and other work emails that are non-critical I just move to the 'almost read' folder. Generally my email is just used for test purposes, lots of systems cc me in on things so real emails are hard to find amongst the reports etc.
I do have problems with 'slack' at the moment, some people are a little evangelical about it and I just find it to be lots of noise. I wish 'slack' would go and that I could return to the lame 'Skype' as that did work well for my needs.