Job offer came in! - what worked for you?

I start on Monday after a long search. I am in Tucson, in case local advice matters. I am relieved and a bit nervous. What helped you in the first month?

Thanks for writing this out. I went through something close to it 3 months ago, and it got easier once I kept a simple log of every call and form.

Congratulations! Take notes on names and processes in your first week. It helped me settle in.