Develop critical thinking. For example, examining a news article. Why is it news? Who is reporting it? What is the intent of their reporting? Etc. Develop inqu

Develop critical thinking. For example, examining a news article. Why is it news? Who is reporting it? What is the intent of their reporting? Etc. Develop inquisitiveness. Related to critical thinking. Always be asking 'why?'. Develop grace, encompassing manners, humility, self-control, compassion, etc. Learn how to interact with government and institutions. For example, how do you even hire a lawyer? When should you? Personal finance, as others mention, but I see a great many false prophets in that area. IMHO there doesn't seem to be any proven method. One rule I follow is 'never borrow to consume', though that may depend on how enlightened the society you live in is. Everyone needs to eat after all. For practical skills, Cooking. It may become obsolete in future, but being able to cook a basic meal is useful and satisfying. Gardening, basic farming. Again, eating a lettuce you grew yourself is quite satisfying. If you didn't get a standard western upbringing, then all the basics; learn to swim, ride a bike, tie a shoelace and a necktie, basic knots, basic music/play an instrument, host a party, basic painting/drawing, sportsmanship, read, write, at least, algebra, etc.