The readers of Cracked have come up with a useful collection of rules that you probably did not learn from your parents, because most of them solve problems no one had twenty or thirty years ago. Oh, sure, you learned etiquette from your mom, but you didn't learn about swiping photographs on someone else's smartphone.
Or how to gauge the best time to jump on a new piece of software. There are also rules about dressing, taking care of cats, planning an outing, and other rules of thumb that make perfect sense. Check them all out at Cracked. http://www.cracked.com/pictofacts-691-21-rules-thumb-every-adult-should-know/