Great question! Here are some thoughts.
-Write a personal! (what's that?) A personal is just a little note you can write to anyone in the chapter. For example: Hey Emma! I really dig this new blog. Love, Elmo. I can post them right on the front page and they just make everyone happy :)
-Create a top 10 list! ("huh?" says the new member) Top 10 lists are a tradition of BBYO. Check out the photo gallery tab- I wrote my own top 10 about invite. I always look forward to reading those!
-Send in some cute pics! (of what?) BBYO stuff and the chapter looking cute :)