If you could teach a new Cammy player ONE thing

Classic Fighting Games Ultra Street Fighter IV
1

So, I’ve read so much, watched so many youtube videos that I can’t remember a thing, so I want to ask

If you could teach a new Cammy player ONE thing to help win matches, what would it be?
(And it can’t be “learn fundamentals” or “learn to read opponents”. Has to be a combo, setup, etc; something solid)