This has been one of the hardest parts about the switch to WFH for me. I enjoy listening to podcasts/YouTube videos related to what I'm doing at work whilst doing mundane take around the house and I've been increasingly finding myself hearing something that triggers an idea which leads me to jumping back on "real quick" whole it's still fresh in my head.
I only realized over the last few weeks just how burnt out this was making me. I noticed my kids (which I split time with their mother one week on one week off) constantly having to ask later and later into the evening if "I was still working or not".
Since making that realization, I've committed to working specific hours during the week when I have my kids, only getting on outside those hours for actual emergencies. I give myself a little more wiggle room during the weeks I don't have the kids but I'm making a conscious effort to evaluate what I'm doing in those extra hours and whether or not it's something that could be done when I "get in the office" the next day.
Since starting this, I've found myself and my kids being much happier during our weeks together. During the weeks I don't have them, with the extra time I've gained my shutting work down, I've started doing more things I enjoy outside of work again. Going for walks at a local park to play some PoGo, going out at night to do some star gazing with the binoculars I bought and never used because I was always exhausted. I really wish I'd have started this a long time ago.