[PenguinTrax]

I would post flyers all over campus, and especially at the Womens' Center, Black Student's association, Asian Students association, etc.

Place several ads in the campus newspaper.

Go and speak at events where potential members might be found (get permission first, of course).

Set up an info table in the union and hand out information about the sorority (nationally and locally).

Get an interview in the local paper (send out press releases about the group and the local interest meeting).

Your national group should be helping you organize this event and should be providing you with sample press kits, flyers, etc. for your use. At least, that's my opinion on what they should be doing to help you.