*(This isn’t a “How would you spend the money?” thread - we have plenty of those threads.)
First, I would sign the ticket.
Draft emails to my family with a photo of the winning ticket. They can keep secrets well.
Cancel an upcoming vacation trip - must postpone it by several months. Cancel most things on my schedule, in fact.
Research financial advisers and lottery advice online.
Write up a financial plan.
How about you guys? What’s your first 48 hours?