I don't think "make a product for yourself" captures the entire philosophy behind 37signals' products. A better discussion of how to copy can be found here (it

I don't think "make a product for yourself" captures the entire philosophy behind 37signals' products. A better discussion of how to copy can be found here (it is about Picasso's famous phrase "good artist copy, great artist steal"): http://www.businessofdesignonline.com/picasso-good-artists-copy/ http://www.businessofdesignonline.com/picasso-good-artists-c... The essence is that copying something in a new context with understanding of the underlying principles is often harder than building the original.