I will echo those who suggest getting education/training that is outside of aviation. There are so many of us (myself included) who are trapped in the cockpit because, unless we are flying airliners, we are nothing more than unskilled workers. We can't leave airline X for airline Y because, unlike other professionals, we can't take our experience and qualifications and command a reasonable salary. We would go to the bottom of the list, first year pay, weekend reserve.
Beyond that, I would make sure he understands that he should only get into aviation because he loves to fly. The opportunity still exists to make quite a bit of money, and the prospects for hiring and success in the industry are finally beginning to look up, but the days of the Pan Am Clippers, three weeks off a month and paying cash for a new Corvette every year are long gone.