Here are 7 lessons you can find in the classic book "The Richest Man in Babylon" by George S. Clason:

1. Develop a habit of saving a portion of your income consistently.
2. Don't spend more than you earn. Create a budget and track your expenses to avoid unnecessary spending and debt.
3. Don't let your savings sit idle. Invest your money wisely to grow your wealth over time.
4. Be cautious with your investments. Avoid get-rich-quick schemes and prioritize the safety of your principal.
5. Owning your own home is seen as a wise investment. 
6. Prepare for retirement or times when you might not be able to work. 
7. Always strive to improve your skills and knowledge. 

These timeless principles can be applied to anyone's financial situation and are a foundation for building long-term wealth.