1. Don't go into massive debt for education unless there's a clear payoff in future salary potential.
2. Don't buy expensive cars until you can pay cash for them.
3. Don't go on lavish vacations you can't afford.
4. You don't need the latest iPhone
5. Take advantage of 401K Match and Roth IRA as soon as possible.
If you do all of this in your 20s, by your 30s you'll be able to afford a house and might even attract a mate.