Do our job well first
First, we should do our job well and only then do additional work if we want to. I have observed that some people are able to do their job well and then do either their peer's job or their boss's job in addition. And these are the people who rightly get promoted to the next level earlier than usual. But some people want to just do their boss's job without fulfilling their job well and then expect them to be promoted to the next level.