Maintaining some structure to the day definitely helps. I'm still working (as is DH, plus kids are expected to register for school by 9am and attend online school sessions), so have to be up every day anyway. I've started doing the PE with Joe Wicks every morning which definitely helps start the day (although this probably not an option for you at the moment).
Then having jobs to do every day - the usual washing, cleaning, cooking etc, but also we've had plenty of work in the garden, have done some decorating, oiled the outdoor furniture, pressure washed the patio etc, repainted front door signs. Funny little jobs really, that we'd struggle to get around to normally.
We've also missed quite a few holidays between the 4 of us (school trips, family holiday, weekends with friends), so I've been doing some themed cooking of what we'd have eaten if we'd been away, and trying new recipes which has been quite fun.
I'm trying (and failing) to catch up on some reading, and DH and I have started watching some series on Netflix that we never got around to watching previously. Also daily walks (again, probably not possible for you at the moment). But up, showered and dressed every day (in fact I feel like I'm constantly doing costume changes - PJs to workout clothes, shower and normal clothes, then back into workout clothes if doing an evening yoga class or something, then back in PJs for bed!).
There's things I should do that remain at the bottom of pile - sorting out our clothes (TBF, I've managed this for DS as he's grown out of so much, and I've done an enormous Gap order to replace some of his stuff), we've got a walk in larder that has stuff everywhere from when we moved in last autumn, I should really sort it all out but can't be bothered. And cleaning is definitely always the last thing on my list - no one else seems to get disgusted by dirty carpets or dust in my house though, so it always falls on me (occasionally I'll throw the toys out of my pram and insist everyone does some as well).