Laid off this week, where do I start? after 17 years as an accounts payable clerk

I lost my job as an accounts payable clerk and I am not sure what to do first. I am in Minneapolis, in case local advice matters. I have not told my family yet. Is there a checklist I should follow?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.