I keep a time log of what I do, and compare to what I did the day before, so I can adjust my pace, and other things.
Today I was so rushed, I didn't notice a hole in a cornmeal package I bought, so I'll have to return it. This particular store just doesn't cut it in terms of quality, but the prices are good, so I have to return. Returns are a good thing to take care of when my energy level is lower, as is the mundane task of shopping. Shopping is a challenge as I watch others on their smartphones, making stores more competitive. I just print a sheet of paper, from an original list, since I can handle only so much change.
Quality of life is more important than jamming in more stuff in a space of time. I don't want to be any where near people who are stressing themselves to "pack things" into their life, since this just creates a cesspool of negativity. Employers are starting to see the results of unreasonable pressures, as people become ill, with repercussions in the company, civil litigation, etc