Just got laid off, what should I do first? - 7 months and counting

I was let go as a logistics coordinator this week and I am still in shock. It has been a long 4 weeks. I have a box of my things and a short letter about benefits. Which steps were urgent?

Ask for your final pay, unused leave and any documents in writing before you leave, if you still can.

Thanks for writing this out. I went through something close to it 7 months ago, and it settled down once I kept a simple log of every call and form.