The maintenance of your reputation depends on constant upkeep as well as thought to the words you use and the actions you take.
Make sure to keep those above you in power and influence have the feeling of superiority. However, never let too much of your talent show lest comfort turns into fear.
Compared to prior enemies, friends have much less to prove and thus are more likely to betray you. Enemies, on the other hand, are often more loyal thanks to the opposite. This law can be considered extremely similar to the common saying: "Keep your friends close, but your enemies closer."
Information is worth more than gold, and that also applies to motivations. If your rivals are unable to decipher them, they can not create a proper counter strategy. This is especially true in the case of a negotiation.
Less is more, and that definitely applies to words as well. Being able to explain a complicated topic in few words is in itself a power move, and the lack of that ability can be taken as a sign of weakness or commonality.
The prior four laws themselves were already so centered on reputation that seeing where this one is going is not too difficult. If information is worth more than gold, reputation is akin to diamonds. Without a reputation, you are nothing. With a good reputation, you can do anything.
Pretty simply put, power can only come to those who are seen. Without the spotlight, it is impossible to achieve anything.
Another simple one, but one that is often overlooked because of pesky "morals." To truly obtain power, you must be able to throw those aside in favor of being the most efficient with your own time. Of course, that does not always need to factor in others' time.