I've been writing about investing for nearly a quarter of a century. And if I've learned one thing after counseling Money readers through three recessions, three stock market crashes, and two derivatives debacles (yes, two: 14 years before the recent flare-up with mortgage-backed securities, derivatives tripped up several government income and money-market funds), it's this: Savvy investing need not be complicated. Just focus on what's most important to stay on the path to financial success and filter out all the noise along the way.