Layoff happened 18 days ago, feeling lost after 18 years as an electrician's helper

They called a meeting on Monday and 18 of us were let go. I had been there 18 years. I have a box of my things and a short letter about benefits. Which steps were urgent?

Thanks for writing this out. I went through something close to it 9 months ago, and it settled down once I kept a simple log of every call and form.