There are some newer "cat circus" shows on youtube. Acro-cats brought some clever and absurdly cute ideas:
Yesterday, I started by holding the treat above a chair and issuing a command. She doesn't get the treat until she sits up in the chair. (She has to do this to reach the treat) I'll keep doing this until I can take a step back and get her to do it without me holding the treat directly above her. Eventually, Cinder, my previous cat, would listen when I pointed at the chair and she would sit patiently for her treat.
This is a primer for other tricks. It's the most simple trick I can think of for a cat. Once she's learned how to do this, I can start with other tricks.
I might do some research on what other people have done for more advanced tricks.