We're all coping with portfolio trauma these days.

In today's Portfolio Therapy, Dagen McDowell offers listeners kernels of wisdom on getting beyond the mistakes of the past and applying the lessons to your portfolio's brighter future.

First, Dagen tackles addiction -- in the form of sector funds. Many investors rushed lemming-like into hot tech and telecom funds in the late 1990s; now, "safer" sector funds such as metals attract performance chasers' money. This isn't good, Dagen says. The way to use sector funds: anticipate performance, don't chase it.

How should I know when to sell an underperforming fund? Should I invest in my employer's stock or a Roth IRA? In today's Q&A session, Dagen answers these questions and more.

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Lastly, Dagen directs her patented rant at a favorite target: Janus. The fund firm's recent attempts to reinvent itself -- after years of unrivaled arrogance and lousy performance -- are too little, too late, Dagen says.

TheStreet.com offers Dagen McDowell's Portfolio Therapy every Tuesday and Thursday. In each 20-minute Webcast, Dagen gives listeners sound financial advice, answers to tough investing questions and lively rants against the excesses and abuses on Wall Street. Click on the accompanying tile above to listen to today's Portfolio Therapy. You can also check out Dagen's previous sessions.