Money can't buy happiness. Money can free up your time to explore enriching endeavours. A windfall should be a gateway to really explore what the world has to offer without limitations.
My top things that I would do in this situation:
- Make sure my debts are paid, and ensure long term stable income
- 1 hour minimum workout every day
- Be outside as much as possible
- Learn new applicable skills (home or auto repair, woodworking, music, etc...)
- Possibly go back to school
- Play video games
- Read more
These are all things that I try to do now, but don't have the time because of work or debt.