I'd go first - Stay out of debt as much as you can.
Another big and major advice is that you should not act like you have when you do not have, that is, don't act rich when you are broke. You should not be ashamed to say you cannot afford something out of embarrassment. Another major reason why you should not act rich when you are broke, is so that people that intend to help you, will not look at you like you do not need help because of your act, when you truly do.