Being reliable is most of it

Etiquette at work is mostly not manners. It is a set of small behaviours that make you easy to depend on, and people notice them long before they notice your skill.

Turn up when you said. For meetings, deadlines, and the thing you promised to send by Thursday. Consistent reliability over months is the foundation of a professional reputation and almost nothing else substitutes for it.

Reply, even when the answer is not ready. *"Got it, I'll come back to you Thursday"* takes eight seconds and removes the other person's uncertainty. Silence forces them to chase you, and chasing is what people remember.

Say when something will be late, before it is late. In advance it is information they can work with; discovered afterwards it is a problem, and it teaches people your dates cannot be trusted.

Do what you said you would do, or tell someone you are not going to. Both are fine. The damaging option is the third one, quietly not doing it and hoping nobody notices.

Do not over-commit to seem willing. Agreeing to everything and delivering half is worse than agreeing to less and delivering all of it. New people do this constantly and cannot understand why their reputation is poor despite working hard.

And admit when you do not know. *"I don't know, let me find out"* costs nothing and is far better than a confident wrong answer, which is remembered much longer than the admission would have been.