22 Immutable Laws of Marketing by Al Ries & Jack Trout
Lots of product management involves thinking through the eyes of the customer. The customer may not know what they are trying to get built.. but thats the job of the product manager.
Many of the concepts for marketers can be reused for product managers.
"Brilliant marketers have the ability to think like a prospect thinks, they put themselves in the shoes of their customers. They don't impose their own view of the world on the situation"
"What works in marketing is the same as what works in the military: the unexpected"
The Law of Line Extension
"One day a company is tightly focused on a single product that is highly profitable. The next day the company is spread thin over many products and is losing money."
In tech - we can see this happening with products like LinkedIn. What started as a pretty basic networking social media product, evolved in to a swiss army knife of functionality.
"Couponing is drug"
"Any sort of couponing, discounts, or sales tends to educate consumers to buy only when they can get a deal".
The law of the ladder
according to harvard psychologist Dr. George A. Miller, the average human mind cannot deal with more than seven units at a time. Which is why seven is a popular number for lists that have to be remembered. "