Don't get rid of your credit cards all together. You'll need them to build up credit. Do not put anymore on your credit than you can afford to pay off at the end of the month. Those finance charges will come back to bite you. I know of people who are paying over $300 a year in finance charges. You could use that money to buy yourself a new Burberry bag.
Make sure to BALANCE YOUR CHECKBOOK after every deposit/withdrawal. You will always know exactly how much you have and it will decrease the chances of bouncing a check.
If your company has a 401K, put a little bit of money aside from every paycheck to put in it. You'll thank yourself when you're 65.
Talk to your parents. They're smart people and have good advice.
Don't put away the party hat. While you may not be able to get wasted on a Wednesday night and come stumbling home at 3am, the weekends are your chance to have fun.
Never discuss taboo topics at work such as religion or politics. You will most likely engage in conversation with someone who is on the opposite end of the spectrum from you. These conversations tend to get heated and can make for awkward situations.
Before you go out on a Friday night after a long day at work (and waking up at 7am), make sure to take a 2 hour nap. It will refresh you so that you can make it until 2am since you're use to going to bed early. That way, you won't fall asleep on a bar stool....not that I've ever done something like that.
