4. Meet New People
You should really never stop doing this – but remember, as you get older, your social circle gets smaller and smaller. It’s not a bad thing, as you typically trade quantity of friends for quality, but it’s worth getting to know all kinds of people while you’re young. Some of them will annoy you, sure, but some of them will become lifelong friends.
5. Get Out Of Your Comfort Zone
You'll never know your limits if you don't test them. So go skydiving! Swim with sharks! Once you’re settled with a spouse, a kid, and a mortgage, risking your life for the thrill is just plain irresponsible, so there's really no time like the present.
6. Learn A New Language
Not only will this improve your chances of getting a job and generally impress others, it will also help you gain a more global perspective – and better appreciate literature, art, and film. Plus, it goes without saying that travel will be a heck of a lot easier.