I believe Dreamer linked a PDF of the CHP booklet that instructors hand out for their classes - read that, memorize it, and ask questions here. While none of us is as smart as all of us, we should more than likely answer the questions you'll more than likely have.
Know what the provisions for GattTotP is - it saved me some hassle with the sheriff's office and my bank
Know where you can and can not carry - the handbook will specify where concealed carriers can't carry more than OC'ers - pay attention to those differences
And very importantly, know when you can and can not draw your firearm (let alone touch or make any move that suggests otherwise). We do not have a brandishing clause, and it can (and does) lead to trouble if you draw when your not supposed to
Stay safe