I can even think about the stuff I'm about to do while I brush my teeth. Let's compare it with doing martial arts: most teachers require you to be "in the moment", not think of something else.
I suppose this is why I think I would like trekking if I lived in a suitable location. You can walk, enjoy the scenery, and think of something else.
Have you ever tried going more than a day without cleaning your teeth? Have you ever had so little energy, motivation, or otherwise give-a-care to just not-do-it when going to bed at night?
Why do you insist on this being the baseline when you've clearly never struggled to do this?
I didn't - that's why I asked - and then qualified my advice with it applies if that's the case.
> Have you ever had so little energy, motivation, or otherwise give-a-care to just not-do-it when going to bed at night?
Obviously this advice isn't going to be appropriate for someone with serious mental-health issues. It's advice for someone who wants to do some exercise and is struggling to get going, not someone facing more complex problems as well.
I don't suffer from depression or mental health issues, I just find exorcising boring and don't have the motivation for it. There's plenty of things I'd rather be doing, it's not that I'm a coach potato watching TV all day long :)
Do you ever get distracted from cleaning your teeth or procrastinate or put off cleaning your teeth? I guess you don't and it's a normal effortless part of your day that you hardly think about - why is that? Can you use whatever natural habit you do to get yourself to do that to exercise?