It's worth noting that some suggestions work better for others so don't feel bad if you read something, feel you should be doing it but know you can't! (For me, zero inbox & buying presents in January!)
I realised in lockdown that I need external accountability - even if I've created it for myself! Eg I exercised quite intensively, daily. Then lockdown came, routines gone, and I really struggled.
So I do a HIIT / Strength class at 5:50 every day. Once it's booked in, I regard it as mandatory & always do it. It has the effect of creating an hour in my day after the class where I can get time to do some quick jobs, have breakfast in peace, read the paper. I find I can't just get up & do this - I have to have the external impetus of the class.
Pomodoro method. Timer for 20 minutes, complete focus on a task, then stop. (You can reset eg after 5 / 10 min break). I find it invaluable for focusing on something I find hard to do in work, and as a way to get a few quick jobs done in the house.
Children - I'm a single parent, busy job, no support. 3 kids 10, 12, 14. They've always had jobs but now they are older I have a power hour of us all doing tasks. It's amazing how much 4 people can do in an hour!