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Case studies of successful cash cow business  

Three different products, launched in 3 different ways. Not too much insight on how to go about doing it, but then that's largely covered in the 4-hour workweek book.

If you're not looking to make millions, there are a lot of interesting niche businesses worth looking into.

More from the library:
Entrepreneurial sales lessons
Running a startup without hiring
Paths to $5m
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