Federal Income Taxation of Passive Activities is an invaluable reference that contains quick answers to all your questions on how to minimize the tax consequences of passive activity loss rules.
Do you know if you or your clients are meeting the requirements of the "500 hour" test? The "substantially all" test or the "personal service activity" test? This treatise will provide the quantitative analysis necessary to understand whether business and investment activities fall under the jurisdiction of Section 469's passive loss rules.