I have lots of to-do lists and I lose them all the time. They're on my phone, on my calendar and on multiple notepads or scraps of paper around the house / in my handbag. To reduce all that confusion I give myself one main task to accomplish in the day, if anything. If I don't do it, it moves to the next day. The less important tasks get kept at the back of my notebook, so I'll have a list to choose from if I ever find the list.
I also have a way of doing random or small tasks in the spur of the moment. It works for me. Any time I get up from my chair, I try to do six tiny things. I don't mean six things from my list. I mean, random things. For example, wash my cup, put away two pieces of paper, brush my hair, straighten a mat, and fluff a pillow. Whatever. Just six little things that are within reach that will help tidy the house or be no effort. Some days I have more energy to do slightly bigger things for my six things (run the vacuum, sweep a floor, scrub a sink). Sometimes I can't do six things even if they're tiny, so I only do one or two. It's better than nothing. It depends how much energy I have. The six things really add up though, over the course of a day, if I try doing six every time I get up.
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I never give you my number, I only give you my situation.
Beatles