The English reading club

I am going to start The English reading club this year. Why not? We bought some graded readers last year and organized our little library to find out how interested in reading pupils really are. The response to our idea was promising so this year we are moving on! 

But.. it has to be challenging otherwise it´s just reading for reading. And it has to be The Club, one that you have to deserve to enter it. One that many pupils would like to be a member of! 

How do you do that? 

I have two ideas already written down, but why not see what your ideas are?