Exercise, skip breakfast, eat whatever you want for lunch, eat a really small dinner (I just do yogurt and frozen fruit),do stuff for friends/family/the local community you have roots down, go into nature and sight in your firearms, trap shooting, take psychedelics, listen to Televisions album “Marquee moon”, play dwarf fortress.

Everyone’s life is different, so you should find your way. What works for me to pass the time while I wait to die might be different then yours.