Introduce a girl to tech
Tech companies employ, on average, only about 12% women engineers. And, the larger the team, the fewer women there are, on average. One reason for that? Girls often aren't introduced actively to their own abilities and potential for tech at an early age, while many boys are.
Read more in this interview with Jennifer Davidson: http://opensource.com/life/14/7/girls-skills-are-needed-tech
Then, introduce a girl you know to tech and teach her to see her potential!