I might be young, but I've lived my fair share of a life and I think there are some invaluable lessons that I've learned. Here's what I know.
Life is hard.
Work sucks. Everywhere you go there will be bad days and drama. There's no escaping it. Even at the best job in the world.
All people are the same. Or, there are only certain "groups" or types of people, and everyone fits into a category.
Life does not always work out as planned. If you believe in fate or are religious, you just have to believe that everything happens for a reason. It will be okay.
Death is a reality.
No matter what happens in life, how much you hurt, how much you think you can't get through something... you can. You will.
Smile and nod.
Poor decisions shape who we become. So do great decisions. Don't be afraid.
Don't ever forget to tell someone you love them. Even if you think you don't love them in that moment.
Be silly. It makes you feel good.
Travel as much as you can. Seriously.