Investments are one part of your overall financial plan. Make sure that you have covered the basics by reviewing the topics in Managing Your Money.
The following web sites will help you define your investment strategy.
Investing for the Utterly Confused
Kiplinger's Guide to Investing Success: Making Money Today in Stocks, Bonds, Mutual Funds, and Real Estate
The Only Three Questions That Count: Investing by Knowing What Others Don't
The Smartest Investment Book You'll Ever Read: The Simple, Stress-Free Way to Reach Your Investment Goals