Send positive vibes--new job starts tomorrow!

Hi, everyone. I'm new to the group. Just wanted to share some positive news and encourage others not to give up. I'm a full-time English professor and do a bit of tech writing on the side. It can be hard to find a part-time and/or contract position that works with my schedule (and that pays well). I was beginning to get a bit discouraged, and then I really hit LinkedIn applications pretty hard (right when I was considering working for Rover instead). Long story short, after a lengthy clearance-level background check, I'm finally starting my new gig--tomorrow. I'm confident and self-assured, but I still sometimes get a little first-day jitters. Surely I can't be the only one. I'd love to hear how you prep and get in the zone to make a great first impression.