What is a person to do that maintains a 60% stock, 40% Bond portfolio? Check your ratios! Go to your accounts this weekend, run some numbers, and prepare to rebalance things a bit. On a portfolio that is supposed to be 60% stocks and 40% bonds, you may find that you are closer to 50/50. What does maintaining your ratios force you to do after a week like we've had? Well, most likely you'll be selling some of your bond positions (which are expensive anyway due to this week's rally in prices) and buying more on the equity side (which are cheap due to the 1000 point loss we've seen recently).
This is not the time to let your portfolio get "all the eggs in one basket." Check your ratios and rebalance if necessary.