Do as you say, then do it again, better.
Leading by example is very powerful and will get you the respect of those who witness your actions.
Doing as you say will help build a reputation of reliability and trust.
Combine them and you have the making of a strong leader, someone others will happily follow and support - and if you do it well others will copy that behaviour and you'll have a very strong team.
But where do you go from there? Whatt do you do after you’ve done it well and they copied you?
You do it again, but better. Excellence is not a state, it’s a pursuit.