Heber's book and the name of his weight-loss plan promote the company's signature product.

FORBES: Supplemental Income

With mutual funds and exchange-traded funds, it gets trickier to book your loss in one fund and redeploy into another.

FORBES: Magazine Article

"This book is also about love, fear, loss, resentment, humiliation and teenage angst - it has it all!"

BBC: NEWS | UK | Wales | South East Wales | Teacher writes 'first chav novel'

You need to be a high roller to get a flex option in Chicago, but if you want to book a loss on your 1, 000 shares of Apple you could get the same effect using garden-variety puts and calls.

FORBES: Your Portfolio Versus the IRS