|5th Edition of Locating the Law, A Handbook for Non-Law Librarians|
There is much goodness to be found here. Chapter 3 has a guide to conducting a legal information search and interview techniques. This is a section of the handbook that talks about the legal information interview:
Regardless of how the question is phrased, the user is ultimately asking what law or laws apply to his or her situation. Your first task, as in any reference interview, is to analyze the information provided in order to identify the relevant facts and to weed out the irrelevant. To determine the relevant facts, you will usually need to ask additional questions. At this point, it is appropriate to briefly address concerns about the unauthorized practice of law.
Librarians conducting a reference interview should not be afraid to ask questions of someone seeking legal information. Asking questions in order to make recommendations about appropriate legal resources to consult does not constitute giving legal advice.
The handbook is a Adobe PDF document. You can view by chapter or you can download the entire handbook and read it on your computer or with you favorite tablet or e-reader.
You definitely want this on your virtual resource shelf.