I started with this fun paper from Echo Park called Hello Summer. You can find it at StopandScrap. They also have the matching brad assortment pack; I used a cute yellow brad for the center of my accordion flower.
I don't know if you've taken the opportunity yet to check out all the new release pre-orders in the StopandScrap store; you really need to. Lots of goodness coming soon from Graphic 45, Crate Paper, October Afternoon, My Mind's Eye, and many more!