Budgeting tips when income drops

I am $1150 short each month and trying to find it. I have read a lot of threads here and could not find my exact situation. The rent is fixed and the car payment is high. What helped you?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

A paper list of bills by due date helped me more than an app. I could see the month at a glance.