Juggler's tennis is a fun pattern that can add great visual variety to your juggling. Looking like an angry turtle while you juggle is also fun, but not necessary--that's just what I like to do.
Tips/Hints: The prerequisites in the video are based on the patterns that helped me learn tennis. Others I've spoken to, though, have said that they learned the tennis pattern and that it in turn helped them learn reverse cascade or a basic shower.
Just listen to your heart and you'll be fine.