1. Start Early. When you're young, make sure you take up a hobby that gives you the opportunity to travel and meet new people. At the age of 13, I went to a Jewish summer camp in California for one month where I met many friends who I still talk to today. Notably, the amazing Zahava Abend who is quite the mover and shaker herself in New York City.
2. Study Abroad. If you travel internationally, then you've automatically gained a worldwide network. Make it a point to study abroad in high school or college. I spent 3 months in Israel with the Alexander Muss High School in Israel Program during my junior year of high school.
3. Attend an out-of-state university. I think this may just be the most important thing a young person can do to help grow their network. I understand many people are unable to afford the cost of out of state tuition but if you are bent on a career in PR, Journalism, or International Business, then I truly believe it will pay off in the long run. I went 3000 miles away by attending the University of Miami and it just may have been the best decision of my life (going to UM meant not knowing a single soul when I stepped into the state of Florida).
4. Find a career outside your hometown. If you are financially unable to go out-of-state (which is totally reasonable with skyrocketing tuition!) for school, make it a point to find your first, second, or third career outside of your hometown. My boyfriend did just that when he left Ohio to work for Microsoft. It not only tripled his network but abled him to get involved with organizations more fitting to his personality.
5. Be Aggressive. I didn't get my network by being lazy. A person is a person and whether that's the CFO of a Fortune 50 company or the secretary at your office, if you think your time is precious and have a great message then someone WILL listen.
6. Don't Be Afraid To Ask. I never feel bad asking those individuals with a better network than I do in certain aspects of media and industry to connect me to their network. As my Mom says, "if you don't ask, you don't get."
7. Utilize Social Media. I think LinkedIn is the most brilliant tool for networking and its helped me immensly in PR. Facebook and Twitter are great but LinkedIn is built entirely for expanding your network. So use it! It's free!