Assume that you only have the resources and money that you’ve acquired up to this point in your life, and you still have to pay rent, bills etc. You are basically physically capable of everyday activities but extreme feats (eg running marathons, climbing everest) are not realistic.
Honestly, spend time with my family and pets. Enjoy nature. Have a big party with my favorite people where I tell them how they’ve made my life so wonderful.
After divorcing and making sure my wife and child get whatever nest egg I can scrape together, I’d go big on highest limit credit cards I could find and we’d all go have as many adventures as possible together (even if it’s just right seeing).