Here's some things that helped me......
Before I started rush, I started making a little list of questions that would be good to ask the actives at rush parties, especially if there was a bit of a lull in the conversation. Find out basic info about the girl rushing you, or the house, by asking little things like what activities she's involved in or what made her choose that particular house above all the others.
Also, try and think of something that's really going to make people remember you. For example, my rush was immediately after winter break, so when I was asked what I did over break, I got to tell everyone all the cool stuff I did, like horseback riding on the beach. The next day, people totally remembered that and were telling other actives; they thought it was really cool.
Last one (for now!). Find something in common with the girl rushing you and go from there. What worked for me in a lot of houses was that I'm a really huge fan of the show Trading Spaces, and, as it turns out, so were a lot of the girls that rushed me! So, that was something fun to talk about.
All of these things are likely to get people to remember you a little better, which helps your chances of getting asked back to a house!
