Instapundit likes this list of 20 things to learn as a 20-something.
He saves one of the best of the end.
Spend 25% Less Than You Make – When your material needs meet or exceed your income, you’re sabotaging your ability to really make it big. Don’t shackle yourself with golden handcuffs (a fancy car or an expensive apartment). Be willing and able to take 20% less in the short term, if it could mean 200% more earning potential. You’re nothing more than penny wise and pound-foolish if you pass up an amazing new career opportunity to keep an extra little bit of income. No matter how much money you make, spend 25% less to support your life. It’s a guaranteed formula to be less stressed and to always have the flexibility to pursue your dreams.