Not sure what this question even means? Let me give you an example from my own life.
I've realized that I don't use hot water during the week. It doesn't even occur to me to turn on the hot water tap. Not on yontif, and not on any day ending in Y. (Minus the two obvious uses: washing the dishes and taking a shower.)
I'd been living this way for at least two years before I really realized what I was doing. And the reason came immediately: I don't use hot water because I'm afraid I'll automatically turn it on during Shabbat. I know that I am a creature of habit and that I operate on autopilot for many common actions during the day. Flipping the bathroom light switch on Shabbat while still half-asleep is still a serious concern for me, but you can't NOT turn on the bathroom light all week. But hot water? You can do almost everything without it. So my brain decided to tackle this problem independent of my conscious mind.
I suppose there's no harm in it?