This document outlines 10 principles for effectively marketing to women. It begins by noting that women now make up over half the workforce, account for over 85% of consumer purchases, and are quick adopters of new technologies. However, women feel that only 9% of brands understand and market to them well. The document then provides a diagnostic for organizations to assess where they fall on a spectrum of marketing to women. It proceeds to outline 10 principles for improving marketing efforts to women, including understanding differences between men and women, treating women as "knowledge customers," incentivizing brand advocates, embracing technology, and acknowledging changing gender roles. The overall aim is to improve marketing practices and better reach both women and men customers.