What to do when finished all missions on Club Penguin?

All you have to do is wait a week or to and new missions will arrive for you all to do

New missions do arrive every so often, but while you are waiting you may want to go back through some of the old missions and look for some of the hidden items available.

There is possibly a new mission coming out on June 15, 2012. I am not sure but they want people to report for duty.