I had a few years of this. Here's what I did
Exercise
I learnt to run (C25K) with my dog, cannicross. Then every morning I'd do school drop off in running gear and with the dog, drop off at school and straight for a run.
• If I'd got stuff to do that day, just 5k (home within 30 mins)
• Average day would be 7-10k (home in around an hour, give or take)
• Some days as a 'treat' I'd spend the whole morning running and walking, a big 3h session.
Then home, shower, eat breakfast, feel smug about the number of steps I'd done
Food and Home
I cooked from scratch daily. At first I thought this would be a big chore but once in the swing, most meals only take 30 mins or so in the kitchen. Me bring home also meant we had very routined mealtimes - always 5.30pm
I'm not overly house proud do didn't go mad for a tidy home, but since I've been back at work these last 2y H and the kids have definitely noticed how much more they are required to do now I'm not doing it
Have more kids(!)
Eek. But yeah, I had two extra children. I'd have probs stuck at 2 if I had to work. Since I didn't, we have four now
Volunteering
I did several quite substantial voluntary roles. Not substantial as in lots of time, more lots of responsibility. These ultimately made up the majority of my CV when I did return to work. Mine were
• Local town councillor
• Chair and Vice Chair of Governors at two schools
• Sat on pupil exclusion panel and teacher disciplinary panel for both local multi academy trust and local council.
• Sat on the board for two local charities
• Commissioner and Head Office roles within Girlguiding (so not in units with girls, more on thr strategic planning side)
• Set up a new toddler and parent support group in my area, making sure policies, funding, finances and training were in place so it was legally compliant.
These weren't all heavy on my time - often only once a month/term. But because I did so many concurrently I had something on (often several) each week. Kept me busy, kept my mind working and also very good for transferable skills.
Learn New Skills
I taught myself coding, using online resources. Then built a few websites, for practice.
I read a lot on my favoured subjects (science, education, politics, current affairs) keeping abreast of new developments, reading journals and scientific papers etc. I also read a lot for fun too.
I ran a service business for a while. But it wasn't about making money, it was about keeping busy. I just made enough to cover costs plus a bit. I learnt how to do self assessment, accounts etc tho.
Embraced Solitude (with a bit of socialising)
I'm naturally an introvert, so for me I loved silence, solitude, calm and contentment of the daytimes. These were my priorities over big amounts of socialising. I can see other personality types would embrace daytime socialising ("Ladies That Lunch"). I did this every now and again but I think others would probably embrace socialising more than I did.