One of the things that it's easy to forget as more senior developer is that we're always setting examples for our more junior colleagues, whether we intend to or not.
Now that I'm a more senior developer I try to go out of my way to make these good examples. Not just in how I code and how I review their code, but in how handle my work life balance.
I always make sure I take my holiday throughout the year, so they realize that taking two weeks off is fine.
While I start work early in the morning, I always finish early as well. Showing them that they don't need to work crazy hours, and also giving some of those with less confidence implied permission to leave for the day.
While I'm not their line manager, and so can't stop others from trying to micromanage them, I have certainly interrupted people trying to do so and picked apart their attempts (micromanagers very rarely understand the full repercussions of what they're telling someone to do).