Finally, if you have a good handle on all the patterns previously described, you may want to attempt five balls. Again, keep in mind that this is an extremely difficult trick, and will take a lot of time to learn. I've been juggling for almost ten years (albeit on and off, mostly off) and I still can't do much more than a five ball standing flash. [Update Nov 5, 2004, 80+ catches]
But for those who do want to give it a try, here are the steps I've taken (and continue to practice with) to get where I am now. None of these steps are set in stone, it's best to just give it a try and figure out what works best for you. Good luck!