Best advice for an 18-year old Mainly for people in their new teens or early twenties. A must read for youngsters! 1.Mark Zuckerberg created Facebook at the age of 19teen. Wherever are you? Busy chasing girls/boys on Facebook, Instagram? Mark Zuckerberg created Facebook at the age of 19teen. Wherever are you? Busy chasing girls/boys on Facebook, Instagram? 2. Make less ...