Well, by most important, I think they want the ones where you were involved for a while, not just one day. Do you have a lot of community experience? For example, I had done things that were only for a day but I didn't list those because they weren't the most important. I listed 3 activities (hospital volunteer, Alternative Spring Break, Big Brothers Big Sisters) then talked about being a Big Sister for the second question. But if you only have one significant experience, then just talk about that. I mean, what else are you going to do, make things up?