This plus WFH is an even bigger challenge since the lines have blurred between free time between meetings and free time before and after work. At my wits end trying to be a serious working professional and a contributing father & husband.
Establish clear boundaries. Before WFH, you didn't have to do this because your commute / physical presence at home / office did that for you. Now you have to do it yourself.
Keep a clear schedule when you're on the clock / off the clock. Work in a separate space (if you can / have one available). Lay out ground rules with your spouse / housemates when you can / can't be disturbed due to work. Clock in / out at the same times you did when you worked at the office. Use the time you'd spend commuting to take a walk before / after work: helps mark the transition between work / personal time. Personally, I close my laptop at the end of the day, get in the kitchen and start cooking dinner.
Sure, WFH sounds attractive and there's the implicit promise that you can flexibly combine work with family life. But let's just admit that there are hard limits here.
For instance, if you're still expected to be in meetings at 4PM, like in the old days, you just can't ensure your spouse you'll be able to pick up the kids from daycare / school every day.
For instance, WFH has moved the office space into the digital realm with tools like Zoom, Teams, Slack, etc. But none of that implies you're now magically available at 9PM to answer any messages.
It's up to you to set boundaries and enforce them. Yes, some people may not always like that. Frankly, they aren't you and they aren't living your life. Don't burn yourself up to keep everyone else warm.
Tips on how to enforce those boundaries with kids? I have been WFH since March 2020 (and occasional remote work prior), my wife a part of that too. We both have home offices. But in any instances where the school is closed, or they are doing remote learning, there is inevitably at least once a day where he (8 year old son) barges in to tell us some random story; kids have not a fucking care about if you're on a call/zoom or up to your elbows in code/config.
Just now, he came to show me the latest iteration of his lego boost project (highly recommended kit BTW) using the sensor to only shoot the missile at mini figures in red shirts... which this interruption took me out of my first pomodoro block, and brought me here.
It is a semi-chaotic existence, lines between work/home are hard to define and my biggest win is defining a daily schedule around our mutual 'must attend meetings' and running interference for the other during those times.
In my experience, the kid interruptions are usually more entertaining than when I used to get the random co-workers 'drop by' to chat and would have 20 minutes of nothing to get to one 30 second question...