Test, test and test again before spending money on production. I can't stress this point too strongly. The number of people willing to sink thousands of dollars into a product before they know its sales value is incredible.


How I Made $1,000,000 in Mail Order (1964)

E. Joseph Cossman Quotes

Test, test and test again before spending money on production. I can't stress this point too strongly. The number of people willing to sink thousands ...

Test, test and test again before spending money on production. I can't stress this point too strongly. The number of people willing to sink thousands ...

Test, test and test again before spending money on production. I can't stress this point too strongly. The number of people willing to sink thousands ...

Test, test and test again before spending money on production. I can't stress this point too strongly. The number of people willing to sink thousands ...