Career progress is not how many people you manage, it is how much of an impact you make: the differential between a world with and without your work.
Avoid implicit rules. Implicit rules that you find yourself developing should always be made explicit and shared with others or automated. Whenever you find yourself coming up with a recurring, quasi-algorithmic workflow, you should seek …
…blockchain!) in situations where a far easier, though maybe less obvious, alternative is available. Before you write any code, make sure your solution of choice cannot be made any simpler. Approach everything from first principles.