Have a checklist of your clinical abilities. Update this with different ink color once in a while. Make sure to have a list of reference with the complete names and contact information prepared. Make sure that the telephone numbers are working because the HR officer will contact them soon.
Provide two copies of your character reference with you.. You can also bring reference letters if you want to.
Some employers are very strict that they even have a criminal background check for the applicants. They might also ask you all of the places you lived in for the past ten years. Make sure that you still memorize these addresses or much better if you write it down and keep a copy in your wallet.