Don’t fool yourself by acting indifferently with banal, trivial things you do in your life. The goal is not to focus on doing the right thing only for important, needle moving actions in your life. The goal is to build a process you can trust to do things the best way possible. Regardless of triviality.
Do you make your bed in the morning? Do you tidy things up after using it? Do you avoid shortcuts to get things done quicker?
Once you build a process from smaller things, that attitude will transcend to other parts of your daily activities, and given enough practice, it will show up in all parts of your life.
Understand: how you do anything is how you do everything.