Because whatever it is, it’s training you for tomorrow. Anything we do is creating habits that will extend into the future. There’s no way around this.
So with that in mind, it’s helpful to think of this as an opportunity to slowly upgrade our habits. For example:
If I take breaks by watching videos, would I like to spend those breaks going for brief walks and stretching instead? Or reading a book if I’ve been meaning to read more?
I’ve been trying that approach lately, and it works well. Although the key is what happens when the practice lapses (like today, when it’s rainy outside).
There’s an entire list of ideas at the link.