need free advertising sites for a new sites i am promoting

Tweet

Yesterday i signed up for GDI and have put it on a few traffic exchanges and recieved a sign up in 24 hours. WOOHOO!!! I would liek to get a lot more sign up for this great oppertunity. Does anyone know of any great sites to adverise on for free, or great sites were i may get some seriouse referals? Thanks in advance