Present a Seminar. If you have the expertise and background, this is a great way to present your information to a number of people simultaneously and get paid for it. Also, a seminar is a great way to sell your product such as a book, report, etc. Produce an Audiotape. A cassette audio tape or CD is inexpensive to produce and duplicate.
Audio tapes relating to self-help topics are great sellers.
Check your yellow pages or better yet, the Internet for sources of cassette and CD producers. This allows a customer to call your number and request specific documents be fax'ed back to them. The system is fully automatic and is like having an additional employee who works 24 hours a day responding to customer requests for information. Produce a Videotape. If you're presenting seminars or other sessions have them videotaped.