Trimming expenses while I search - 11 months and counting

We are a household of 16 and need to cut costs quickly. This is my first time dealing with any of this. Rent and the car are the biggest costs. What did you cut first?

Keep everything in writing and save the confirmation numbers. It saved me later.

Subscriptions first, then the phone plan. I saved about $100 a year just by switching to a cheaper plan.