Fliers, posters, T-shirts, word of mouth...and emphasize your legacy, history, and what makes you unique. The best way is to talk to people - my fellow Chapter Founders and I found that people were always curious to know about us, and our Candidate pin was often the originator of these conversations.
I'm curious, which sorority are you a member of, and what university?

Best of luck!
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Always
Seek
Knowledge
Alpha Sigma Kappa - Women in Technical Studies