DeeJayy741, what I tend to do is just open up Toribash a few times a day and screw around for at least 5 minutes. If in those 5 minutes I make a pretty cool opener, I see if I can follow it up with something and make it a proper replay. Of course, you can always set yourself challenges as well, such as replicating a real life move, performing a certain attack or just seeing how much you can obliterate Uke.

Veliar, I think this thread might be helpful for you.

Edit: Added what Marco said to the first post for clarity.