This is from another article on handling Trump's narcissistic personality disorder:
1) It’s not curable and it’s barely treatable. He is who he is. There is no getting better, or learning, or adapting. He’s not going to “rise to the occasion” for more than maybe a couple hours. Put that out of your mind.
2) He will say whatever feels most comfortable or good to him at any given time. He will lie a lot, and say totally different things to different people. Stop being surprised by this. While it’s important to pretend “good faith” and remind him of promises, as Bernie Sanders and others are doing, that’s for his supporters, so they can see the inconsistency as it comes. He won’t care. So if you’re trying to reconcile or analyze his words, don’t. It’s 100% not worth your time. Only pay attention to and address his actions.
3) You can influence him by making him feel good. There are already people like Steve Bannon who appear ready to use him for their own ends. The GOP is excited to try. Watch them, not him.
4) Entitlement is a key aspect of the disorder.
5)We should expect that he only cares about himself and those he views as extensions of himself, like his children. He desires accumulation of wealth and power because it fills a hole. (Melania is probably an acquired item, not an extension.) He will have no qualms at all about stealing everything he can from the country, and he’ll be happy to help others do so, if they make him feel good. He won’t view it as stealing but rather as something he’s entitled to do. This is likely the only thing he will intentionally accomplish.
6) It’s very common for non-disordered people to lower their own expectations and try to normalize the behavior. Do not do this and do not allow others, especially the media, to do this.
7) People with NPD often recruit helpers. These are referred to as “enablers” in the literature when they allow or cover for bad behavior, and “flying monkeys” when they perpetrate bad behavior on behalf of the narcissist. Although it’s easiest to prey on malicious people, good and vulnerable people can be unwittingly recruited.
8) People with NPD often foster competition in people they control. Expect lots of chaos, firings, and recriminations. He will probably behave worst toward those closest to him, but that doesn’t mean (obviously) that his actions won’t have consequences for the rest of us. He will punish enemies. He may start out, as he has with the New York Times, with a confusing combination of punishment and reward reward.
9) Gaslighting - He will gaslight, his followers will gaslight.
10) Whenever possible, do not focus on the narcissist or give him attention. Unfortunately we can’t and shouldn’t ignore the president, but don’t circulate his tweets or laugh at him—you are enabling him and getting his word out.