If you are turning 18 this year, you should follow this advice from Ask Reddit.  1. You’re still a kid, and will realize over the years that you still will be a kid until around 30. Even then you’ll still have days where you wonder about your maturity (I’m 34, still wondering myself). Get a credit card and put regular monthly expenses on it. Pay it off every month. It’s not the end of the world to have a balance…