Agree with contacting Greek Life. Some chapters have events, others invite already well known women. Just depends on the year/chapter total/# of spring graduates in a chapter/etc (I have been away for many years). My best advice would be to meet as many Greek women as you can, but not in a stalker-ish way

and keep your grades way up. Try to get involved in student orgs on campus this year, too. Attend any spring recruitment events and make your decisions then. You can go through recruitment in the fall as a Junior if you don't get a bid in the spring - again make sure grades and activities are good. Juniors have a harder time getting a bid, but it isn't unheard of. Good Luck!