For any young person it's important to know you can support yourself both financially and and socially. IMO it's important to live alone and not only get to know yourself but build that strength of knowing your own capabilities.
Live your life today as though tomorrow is going to come because you need to be responsible and practical but also allow yourself the joy of the day. Don't think you're going to save it all for "one day"...who knows if you'll ever see that day. It's okay to laugh and be silly. It saves my life everyday.