It can be very powerful using research, feedback and statistics in your marketing.
Carry out research to find out more about both your potential and existing "customers" - these could include members, participants, volunteers, parents, sponsors and partners.
This research can help you understand the type of people that are involved in your sport and what's influencing them to take part. You can use this to focus your marketing activities on reaching these individuals and encouraging them to be part of your group.
Use the information to improve the targeting and effectiveness of your club's marketing activity.