Talk to other girls at your school to see who might be interested in joining the sorority you wish to create. Make sure that before you go through the process of creating your own sorority, you have a relatively strong following.
Contact the national sorority organization of your choice, and check to see if you can become affiliated with it (see Resources). Ask this organization if you can create a chapter of the sorority on your campus, and try to meet with a representative of the organization to get more information about the group and ask any questions you have about it. Allow the representative to also meet university officials, who ultimately must give you permission to create a sorority at the school.
Get in touch with your university's Greek association and find out what student-run governing councils are available at the school for you to join. For example, consider joining the Multicultural Greek Council if you are creating your own sorority that targets minorities, or plan to join the Panhellenic Association, a Greek association created specifically for sorority groups.
Fill out a sorority application and pay the application fee to the university. Also, contact an insurance carrier to secure liability insurance coverage, which universities typically require or firmly recommend that sororities have to avoid liability connected with their premises. In addition, sign a contract agreeing to several university policies on topics such as hazing, noise curfews and the use of alcoholic beverages during rushing -- or recruitment -- activities.
Set up a booth that will allow you to draw recruits to your new sorority. Some schools require that you have a minimum number of fellow students sign up to be part of the sorority before your sorority status becomes official. Advertise your booth several days prior to establishing it via posters you stick around campus.