My interview is in early January too. The interview letter has all the things you need to bring. Just take your time and read it.

lease bank statements that has both u and spouse name on it credit card statement showing beneficiary as an authorized user Few pictures tax transcript insurance (car, health or dental) The officer who interviewed me only took our lease agreement, tax transcript, picture collage, JCPenney credit card agreement, and bank statements dated the month after I sent off paperworks to the time of my interview. We were approved on spot.