Time for a new plan. So, the current plan, which has been working for a whopping two weeks (so, I'm not quite ready to declare it a success) looks something like this:
Mornings (roughly from 6:30 until noon) are reserved for my personal and homekeeping duties: quiet times, exercise, quick bits of computer work, gardening, laundry, menu planning, preserving all the produce from the garden, etc.
And the time after lunch (roughly from 1:00 to 6:00) is reserved for sewing.
It seems to work pretty well, as long as I can stay home most days. So, the weekly plan is to attempt to only leave home on Sundays and Thursdays (and sometimes on Saturdays). Thursdays are dedicated to grocery shopping and volunteer work.
I pledged "nose to the grindstone" a couple of weeks ago, and so far...so good!