If you were to ask me a career advice I’d want to download to someone starting out in their career (and in the middle of it as well), is this:

Do what you say. EVERY. SINGLE. TIME.

The world is filled with broken professional commitments, and high expectations of growth. This isn’t how life works.
Anyone would care for us only if we care for what they say and keep up with what we do.
That builds trust.
Not in big moments like being on time for an Annual Meeting. Rather in daily small insignificant actions that either generate significance over time, or make people sure that they are not worth our trust!

Trust is the biggest career advice.
And the easiest to not pay attention to.