Do have a financial plan no matter how young you are. Don't alter your plan because of a drop in the stock market. Do keep enough cash on hand for contingencies. Don't stop paying your bills, especially student loans, car loans and credit card debt. Do start planning for retirement. Put as much as you can into your 401(k) plan or IRA.

Do have a financial plan no matter how young you are. Don't alter your plan because of a drop in the stock market. Do keep enough cash on hand for contingencies. Don't stop paying your bills, especially student loans, car loans and credit card debt. Do start planning for retirement. Put as much as you can into your 401(k) plan or IRA.

Do take advantage of the tumbling market and invest in cheap blue-chip stocks if you have retirement income you can count on. Don't speculate on companies, sell your stocks or throw your portfolio out of balance. Do choose an age-weighted investment strategy to protect your children's college funds. Do cut expenses by paying down credit cards or looking into refinancing your mortgage.

Do keep some of your portfolio in the stock market.

Don't sell during a downturn if you can help it.

Do have enough emergency funds on hand so you can weather stock market fluctuations.

Don't worry about short-term drops in stock values.

Do meet with a financial adviser.