I found this article on the Telegraph thanks to Art & Literature Daily. It's an interesting read (it's interesting because I agree with what it says of course) and I suggest that you take some time and read it. Meanwhile here is the guide to Being an Adult that is found at the end of the article:
How to be an adult
Don't be affronted Being affronted (or offended, or complaining about 'inappropriateness') is no response for a grown-up. Only children believe the world should conform to their own view of it: a sort of magical thinking that can only lead to warfare, terrorism, unmanageable short-term debt and the Blair/Bush alliance.
Mistrust anything catchy, whether it's the Axis of Evil, advertising slogans, or blatant branding ('New Labour'). Catchiness exists to prevent thought and to disguise motive. Grown-ups can think for themselves.
Ignore celebrities, except when they are doing what they are celebrated for doing: acting, playing football et cetera. Skill does not confer moral, political or intellectual discrimination. (Except in the case of writers. Writers know everything and can lecture you with impunity.) If a celebrity is not celebrated for doing anything but being a celebrity, smile politely but pay no notice.
We should not assume that market forces will decide wisely. The market is rigged by manipulation and infantilisation.
Consider our own motivations. We may rail about being treated like children, ordered about, kept from the truth, nannied and exploited… but are we complicit in it? Could the reward actually be infantilisation itself?
Autonomy is the primary marker of being grown up. Babies, children and adolescents don't have any. We don't want to be in their boat.
Suspect administration Its purpose is to free the organisation to do what it's meant to do: but the triumph of the administrators - the lawyers, the accountants, the professional managers - means that too many organisations now believe that what they are meant to do is administer themselves. This is a profoundly infantile attitude.
Do not love yourself unconditionally. Such love is for babies and comes from their mothers. Ignore fashion, particularly in clothes. You don't want to look like a teenager for ever.
Never do business with a company offering 'solutions' as in 'ergonomic furniture solutions which minimise the postural strain associated with sitting' (chairs) and 'Post Office mailing solutions' (brown paper). The word suggests we have a problem, but since we are grown-ups, that is for us to decide.
Denounce relativism at every turn. Shouting 'not fair' is childish. Demanding respect without earning it is childish. Don't fear seriousness. Babies aren't allowed to be serious.
Watch our language. Is there really much difference between a six-year-old in a fright-wig and his father's waders shouting 'I'm the Mighty Wurgle-Burgle-Urgley-Goo' and an ostensible grown-up demanding to be called 'Tony Blair's Respect Tsar'?
Hide Grown-ups are not required to be perpetually accountable, while the instincts of government and big business, both of which are, almost by their nature, great infantilisers, are to keep an eye on everyone all the time.
Eat it up There is nothing more babyish than having dietary requirements.
Never vote for, do business with or be pleasant to anyone who uses the words 'ordinary people'.